(C) 2009 W. Jim Jastrzebski
GRAVITATION demystified
Explanation for high school students and physicists why things fall
and why the time runs the slower the farther one looks.
Einstein: "You do not really understand something unless you can explain it to your grandmother".

In 1687 Isaac Newton (1643-1727) discovered a mathematical theory of gravitation. He didn't know the physical reason for his theory but he refused to believe that it is gravitational attraction since he didn't believe in action at a distance. Neither did Albert Einstein (1879-1955) who called it spooky. In 1905 Einstein discovered relativity that made possible to discover physical theory of gravitation. He did it in 1911-1915. Its field equation turned out to be unstable and Einstein stabilized it in 1917 discovering cosmological constant Λ. The only flaw left then was the symmetric metric tensor of spacetime that prevented to discover the reason for the redshift of photons in stationary space. In 1950 Einstein found that the metric tensor must be non symmetric. It was a necessary step in discovering the reason for the Hubble redshift. Einstein was already over 70 and apparently not interested in fixing all the mathematical details of his theory. He left to younger physicists the explanation of Hubble redshift.

The younger physicists failed miserably: In 1973 Charles Misner(1932-), Kip Thorne(1940-), and John Archibald Wheeler(1922-2008) (MTW) ignoring the interrelation of time and space of relativity, Einstein's assertion of 1950 that metric tensor of spacetime must be non symmetric, and even the principle of conservation of energy, published their own, mathematical theory of general relativity based on axioms. They assumed symmetric metric tensor of spacetime and they accepted 1931 idea of an astronomer, mathematician, and Catholic priest, George LeMaitre (1894-1966) that the universe got created in the Big Bang event 14 billion years ago and is expanding ever since. MTW book has been adorned with a picture of an angel blowing a horn and a quote from Leibniz "One suffices to create Everything of nothing!" on page 1218.

The necessity of calculating the amount of redshift in Einstein's universe that would falsify the story of creation was avoided by convincing astrophysicists that it is negligible. The cosmology with never calculated amount of intrinsic redshift and with violated principle of conservation of energy became a "standard cosmological model". The lack of conservation of energy has been more subtle than the creation of whole universe from nothing. It was an assumption that photons move without any loss of energy as if the real gravitation was not Einstein's but Newton's mechanics.

In 1985, not knowing that the redshift in Einstein's universe is supposed to be negligible, I calculated it using Newton's math and Einstein's physics. The Hubble constant of Einstein's universe turned out to be Ho = c / RE where c is speed of light and RE is Einstein's radius of universe. The calculations predict that the expansion of space is an illusion that should be observed as accelerating expansion with dH / dt = - Ho2 / 2. In 1998 the Supernova Project showed that observations of universe are consistent with this Einsteinian prediction with accuracy better than fraction of standard deviation, yet no editor of any scientific and even popular journal was couragious enough to publish the news. The plot thickens...

Table of Contents

Introduction

The result proved to be unpublishable despite this remarkable agreement with observations of Hubble constant and its acceleration, both predicted by Einstein's gravitation and both observed by astronomers in deep space. It seemed to be no surprise to editors of scientific journals as if they had known already that the real universe is Einstein's stationary universe and that the expansion is just wishful thinking of cosmologists opposing Einstein's gravitation.

The cosmology seemed to deteriorate to the point that despite that Hubble constant of Einstein's universe could be calculated from first principles by a sculptor and was the same as the one observed in the real universe by the real astronomers, the cosmologists responsible for maintaining observations and theory in agreement with one another still maintained that the universe was created in a hot Big Bang and it is expanding. It turned out to be an immutable axiom of their hypothesis of creation of universe.

For astronomers it meant choosing what in their opinion was the more probable option. The atheists, like Carl Sagan (1934-1996), have chosen even earlier, an eternal, stationary Einstein's universe but the consensus of ill informed (by editors of scientific journals) astronomers still prefers the expanding, "standard model" universe controlled by Newtonian mechanics.

For Einstein's general relativity it meant that there exists a tensor formed by second partial derivatives of proper time with respect to coordinate time and coordinate distance (called H-tensor or tensor of "general time dilation" to distinguish it from common "gravitational time dilation" that being of vectoral character disappears in homogeneous space). Physical sense of this H-tensor is that time at the distance from the observer runs slower than at the observer proportionally to the exponent of the distance, simmulating the accelerating expansion of space. This tensor should add up with Ricci tensor of curvature of space, to (tensoral) zero, making the spacetime intrinsically flat, proposed also by Halton Arp (1927-) Jayant Narlikar (1938-) team, which is also necessary for the principle of conservation of energy to hold.

Einstein's universe got vindicated as predicted by Richard P. Feynman (1918-1988), that "Whenever the predictions o Einstein have been found to differ from ideas of Newtonian mechanics Nature has chosen Einstein's."


Feynman could enjoy the success of his prediction if the editors of scientific journals didn't decide to keep the collapse of MTW mysticism a secret. Officially as not interesting enough to their readers. My guess is that they decided not to publish the news that the universe is Einstein's not to embarrass the theorists who were making living off the idea of expanding universe and astronomy seemed to be not important enough to justify such an embarrassment of theorists. After all "the beauty of astronomy is that unlike in civil engineering one can be 100% wrong and nobody is hurt" [Don A. Lautman, my astronomy teacher at Harvard Smithsonian Center for Astrophysics, Cambridge, MA].

Since the news about Einstein's universe and about the general time dilation were refused to be published by scientific journals (like "Nature", "Physical Review Letters", "Science", "The Astrophysical Journal", even by popular ones as "Physics Today", "Scientific American" and others) the astronomers still don't know it even today (in 2009, which still doesn't hurt anybody) and many of them who don't understand Einstein's physics might think that the redshift they see as the Hubble redshift results form the recession of galaxies in expanding universe. The necessary in such scenario creation of energy from nothing they might treat as a "natural phenomenon" resulting "somehow" from "negative gravitational energy" the mechanism they might not understand what cosmologists (mostly application mathematicians who have little appreciation for physics and firmly established physical principles as e.g. the principle of conservation of energy) keep "explaining" to them. Even Einstein complained that he stopped understanding his theory when mathematicians began to explain it to him. And that's maybe why physicists don't understand gravitation.

Feynman called some cosmologists idiots for supporting a "claim based on the stupidity of the author that some obvious and correct fact, accepted and checked for years, is, in fact, false (these are the worst: no argument will convince the idiot)" [fragment of Feynman's letter to his wife from 1962 Gravity Conference in Warsaw, Poland]. In the above fragment Feynman might have meant the principle of conservation of energy which is invalid in the BBGR while Feynman considered it true.

After 1998 disastrous for BBGR observation of accelerating expansion the opponents of Einstein's universe patched their hypothesis of expanding space with assumed ad hoc "repulsive gravitation" called now "cosmological constant" and with the existence of exotic "dark energy" contained in this "cosmological constant" that allegedly were using this repulsive gravitation, through action at a distance, to expand the universe faster and faster.

The editors of scientific journals might have known that cosmology is a pseudoscience created to employ scientists who couldn't earn living in any legitimate branch of science. But cosmologists aren't even smart enough to keep low profile, to admit cautiously that "they actually don't know", and to limit their activity to picking up their salaries, allowing at least astronomy to develop at its own pace. Instead they insist against Einstein's theory that (1) space is expanding, (2) spacetime is curved (of unknown yet intrinsic curvature), (3) the metric tensor of spacetime is symmetric, and (4) energy constantly created (most likely through divine intervention) an idea supported by the Pope and creationist businessmen with their millions of dollars in awards to cosmologists who support creation.

But the worst of all, (5) they consider investigating the nature of "dark energy" the most important problem of physics of 21st century, blocking resources that are needed in real sciences, and (6) being the referees of gravitation papers they control the publication of papers dangerous to the Big Bang hypothesis. The cosmology from cheerful and harmless activity of the previous century became a damper on science. The creationism got into science through the back door of astronomy using mimicry calling their hypothesis of creation "general relativity" the name by which Einstein theory has been known.

Support of creationists for the BBGR has been documented by March 2008 Templeton Foundation's award of $1,600,000 to an astronomer, cosmologist, mathematician, and Catholic priest, Michael Heller from the Papal Academy of Krakow, Poland, "in recognition of scholarship and research that has pushed at the metaphysical boundaries of science".

If this trend continues we might be in a danger of establishing laws against engaging in science without a license (applied especially to sculptors). Even now people are banned for life from scientific fora, as it happened couple of times to me, just for trying to discus Einstein's universe which apparently creationists consider dangerous to the idea of creation. With complacency of people responsible for maintaining those fora not even creationists themselves. So far...


Einstein's real general relativity doesn't allow neither "repulsive gravitation" nor "creation of energy". All of them are empty ideas that differentiate between science and creationism. The spacetime requires intrinsically flat geometry (as long as the space is curved and time dilated). It doesn't need "dark energy" (another empty idea) and gravitation is so simple that the high school education suffices to understand it. Even a sculptor with a high school education may explain it to anyone who wants to learn why things fall. That's why "few of the best men are doing work in it [...] It is not that the subject is hard; it is that the good men are occupied elsewhere." [Feynman].

Since editors of scientific journals claim that their readers aren't interested in the results that I got (as e.g. editors of "Phys. Rev. Lett." wrote to me) I'll show below, for those few who are interested, how Einstein's gravitation works. Why things fall, why the curvatures of spacetime cause the illusion of gravitational attraction and the illusion of accelerating expansion of space. Then I'll make comparison between the Big Bang general relativity and Einstein's general relativity in an attempt to show the readers who are interested, why there is no reason for believing in neither the Newtonian gravitation nor the Big Bang GR. Not to expand this text too much the quantum nature of Einstein's gravitation will be skipped. It suffices to mention that quanta of gravitation are photons so unifying gravitation and electromagnetism is already contained in Einstein's theory. "Some physical theories are often smarter than their creators" [Hertz]. The reader may easily deduce the quantum nature of gravitation from the basics of gravitation and find out that role of gravitons may be taken on by any particles that atoms exchange between themselves like photon's, gluons, neutrinos (or shmutrinos if they exist).

Einstein's gravitation can be really explained to anyone's grandmother especially when the granny attended a high school, liked physics and math, and is not prejudiced against Einstein, which almost never happens to grandmothers but often to physics professors. Some physic professors would like to abolish the conservation of energy under pretext of reconciling Einstein's gravitation with quantum mechanics. Apparently those professors don't known that Einstein's gravitation is already a quantum theory.

In the Big Bang hypothesis we have a collision of physics (the redshift of photons interacting gravitationally with the rest of universe) with assumed math (the symmetric metric tensor that prevents photons from having redshift in stationary universe). That's most likely why Einstein solved this contradiction in 1950 by assuming non symmetric metric tensor for the spacetime which allows the Hubble redshift in stationary universe. Simple calculation reveals that the Hubble redshift observed in our universe is exactly equal to the redshift resulting from dispersion of kinetic energy of photons in a stationary universe. Yet, the cosmologists assumed the symmetric metric tensor of spacetime and got an artifact of expanding space.

Feynman warned the cosmologists: "Let me also say something that people who worry about mathematical proofs and inconsistencies seem not to know. There is no way of showing mathematically that a physical conclusion is wrong or inconsistent. All that can be shown is that the mathematical assumptions are wrong. If we find that certain mathematical assumptions lead to a logically inconsistent description of Nature, we change the assumptions, not nature." [Feynman lectures on gravitation]. Yet in the case of universe the view of nature has been changed to accommodate for mathematical assumptions.

Finally, Einstein's 1950 assertion that metric tensor of spacetime must be non symmetric was not even mentioned by MTW. Those gentlemen assumed at the onset of their monograph a symmetric metric tensor, as also Einstein did at the beginning but for Einstein it was in 1911 when no one yet heard about the Hubble redshift. MTW did it in 1973, 23 years after it was known that Einstein maintained in 1950 that symmetrical tensor field must be replaced by a non-symmetrical one. Yet MTW didn't try then to examine the Einstein's assertion allegedly because it wouldn't be as elegant a metric tensor as the symmetric one. To which Einstein had already said: "If you are out to describe the truth, leave elegance to the tailor."


Basics of Einstein's gravitation

What is the nature of gravitational force?

In short, the gravitational force is a force that pushes particles of universe towards other particles of universe. The reason for this force was not known before Einstein discovered a physical theory of gravitation in 1915. It was commonly imagined as a mysterious attractive force acting between all material particles of universe, against common sense at a distance, attracting all of them to all other particles of universe in agreement with Newton's math (see equation 1.4 in Apendix 1 for Newton's equation for gravitational force).

Newton himself, having a critical mind, never believed that such attractive force existed. He knew that his theory is only a mathematical theory, so called phenomenological theory, and as such it is only describing phenomena and not explainig the reason for them, their physics.

It turned out that Newton was right and there is no such attractive gravitational force in Nature.

The gravitational force turned out to be coming from diminishing energy of particles in vicinity of material objects, along direction towards those objects. Along this direction the time happens to run slower (the effect called gravitational time dilation) and therefore all velocities are proportionally smaller. There is also an expansion of space in vicinity of material objects so it takes even more time to cover the expanded space at any given velocity. Both effects result in effective slowing down all velocities and with them the diminishing of all energies. Anything that does any movements, rotations, or vibrations does them slower so it contains less energy than before the particle got into the vicinity of certain material object.

Since the total energy of each particle is its inertial mass times coordinate speed of light squared (the famous Einstein's E = MC2) the energy of each particle diminishes along this particular direction by the amount that the square of speed of light is diminishing. It produces an inertial force pushing the particle in this particular direction of diminishing energy. This force (being by its nature an inertial force, since it shows up only when the free movement of the particle is restricted) is customarily called "gravitational force".

Summing it all up: The diminishing of energy of a particle is caused by the slowing of velocities related to this particle. Slowing of velocities is caused by the slowing of time and the expansion of space. The slowing coordinate speed of light along certain direction causes the internal energy of a particle to diminish along this direction. The diminishing energy pushes the particle in the direction of diminishing energy and as always in such cases a force shows up and it's equal F = - dE/dx (where dE is a change of the energy of the particle along distance dx). This force is called "gravitational force" since it is equal F = mg, where g is the acceleration that the particle moves with while it is in a free fall.

The acceleration must be such since the excess internal energy that the particle loses while the coordinate speed of light gets diminished, changes into a kinetic energy of the movement of the particle and so the energy is conserved automatically. And of course in a free fall the total change of energy of particle is automatically zero. This is the reason for conservation of energy in gravitation. No more mysterious "gravitational potential energy" that changes into kinetic energy of movement causing as the effect the conservation of energy: it is other way around: since nature can't make energy from nothing (remember Anaxagoras) there is acceleration g in a free fall that follows form this inability of nature to make energy from nothing.

So finally we know what gravitational force is: It is an inertial force with which any object restricted from following its path of free fall to get to the position of its lower energy, pushes at whatever is restricting it. It is a force coming from within the gravitating object itself due to the particular properties of space and time around it (spacetime in short) and equal to minus derivative of energy of particle with respect to the displacement of particle in our frame of reference (- dE/dx).

* * *

Integral of this gravitational force along displacement is gravitational energy the same as in Newton's theory. What is different in Einstein's physics than in Newton's math is that in Einstein's physics this energy has a well defined location in space, namely the gravitating particle itself. And its value, as we show in section "How gravitational force is generated", is E = mc2. If Newton knew about this equation he might have discovered not only the math of gravitation but also its physics. Luckily there was Einstein to do it.

The gravitational push varies according to structure of time dilation in space and the curvature of space (or according to structure of spacetime) which in turn varies according to distribution of energy in this space. So the gravitational force is an inertial force generated by certain, in general varying (and the results of changes propagate with speed of light), distribution of energy in this space, the principle of conservation of energy, and nothing else.

It is an important feature of Einstein's gravitation that there is nothing else beyond curvatures of spacetime and the principle of conservation of energy is controlling all gravitational phenomena in universe including its apparent accelerating expansion.

The gravitational force will be derived below and then it might be seen why it must have quantum nature automatically. An atom, exchanging a quantum of energy, e.g. a photon, with another atom, loses by it also a quantum of its gravitational energy (ΔE = Δm c2 = hν) which says that photons are also quanta of gravitational energy, and so Hertz actually discovered also the gravitational waves :-).

Details of how gravitational force is generated

In our frame of reference the total energy of any particle is (see Landau and Lifshitz, Theory of fields)
  E = m(v) c2(x) (1)
where m(v) is inertial mass of the particle or
  m(v) = m / [ 1 - v2(x) / c2 ]1/2 (2)
where m is the rest mass of particle, an expression familiar from special relativity, where v is velocity of the particle in our frame of reference, x is displacement within this frame, and c(x) is coordinate speed of light within this frame, or
  c(x) = c [goo(x)]1/4 (3)
where goo is time-time term of metric tensor of spacetime, or (dτ/dt)2, where τ is the proper time of point in space and t is the coordinate time of observer observing this point in space. So the time at point in space (the proper time of that point in space) is different than the time shown by observer's watch (coordinate time or observer's proper time).

The derivative of energy (1) with respect to displacement x (a derivative that when with opposite sign is called "force that pushes the particle" since the particle always tries to achieve a lower energy level), putting c(x=0) = c and m(v2=0) = m, is
  dE/dx = c2 [dm(v)/dx] + 2 c m [dc(x)/dx](4)

Since for a particle at rest v = 0 then from (2) dm(v)/dx = dm/dx = 0. What is left is dc(x)/dx and in the real world the light ray bends in the vicinity of a material object twice as much as it is required by curvature of space and so it means that around material objects speed of light changes and it better be dc(x)/dx = - g / 2c because otherwise energy (1) couldn't be gravitational energy. But if it is then in a static situations we should get some force F(x) = - dE/dx acting on a particle pushing it in the direction of its diminishing energy. Substituting dm(v)/dx = 0 and dc(x)/dx = - g / 2c into (4) we have
  F(x) = - dE/dx = g m (5)
and therefore exactly the same as Newtonian inertial force. And it is our static gravitational force the same as Newtonian gravitational force. Except that we figured out this force directly from the diminishing speed of light in direction of gravitational field g (which we intend to show that it is a necessary consequence of time dilation and the curvature of space). And then our gravitational energy is the internal energy of a particle, given by (1), and located not in the field but within that particle. Now we have to prove that our working assumption that dc(x)/dx = - g / 2c is actually true.

The proof of dc(x)/dx = - g / 2c

We need to find out how the coordinate speed of light c(x) is related to gravitational field g. To figure out this relation we need to remember the following facts:

The angle of deflection of light ray in vicinity of material objects is twice as large as it would be predicted by existence of Newtonian gravitational field due to time dilation. Einstein's guess was that half of this angle of deflection is due to time dilation that simulates the Newtonian gravitation and the other half is due to the curvature of space that has no counterpart in Newtonian gravitation.

Next fact is that when the time slows down everything is running more slowly in the same space. When one side of a light ray runs more slowly than the other the light ray bends in direction of smaller c(x) and the angle of deflection is
  φ = - [dc(x)/dx] t (6)
where dc(x)/dx is change in speed of light per unit of distance across the ray and t is the time of light passing the area of changed speed of light.

In a flat space the angle of deflection of light ray would be due only to the change in speed of light across the ray. In a situation when space is curved the curvature of space bends the light ray without any change in the speed of light since then both sides of the light ray move in the (curved) space straight. The light "gets bent" (but actually going straight in a bent space) due to the space curvature without a difference between speeds of light across the ray. So to find observationally dc/dx we need to take a half of the observed angle of deflection of light in gravitational field g and apply equation (6) to it.

The angle of deflection of light ray may be derived from an example with a rocket ship in space, sufficiently far from all material objects not to feel any influence of those objects, accelerating let's say as much as the particles that fall on the earth. If there is a light ray that enters the rocket ship perpendicularly to the direction of acceleration of rocket ship the observer in the rocket ship will feel gravitational field but the light ray won't and so it will move along a straight path in relation to the fixed points outside accelerating rocket ship. The observer accelerating with the rocket ship however will see the light ray bent towards the rear end of rocket ship (assuming that the rocket ship accelerates forwards). In relation to the rocket ship that is accelerating "up" with acceleration g the ray is dropping "down" with the same acceleration g. The height of this drop is (integrating the acceleration g twice with respect to time)
  h = g t2 / 2 (7)
where t is the time that takes the light to cross the rocket ship. In relation to observer accelerating with the rocket ship the light is moving along a parabola, which for our purposes may be approximated very well by an arc of a circle. The tangent to this circle at the point where the ray enters the rocket ship crosses halfway through the rocket ship the tangent to the circle at the point of leaving the rocket ship. It makes the angle between these tangents (angle of deflection of ray), substituting h from (7):
  Θ = h / (t c / 2) = g t / c (8)

According to Einstein's principle of equivalence of acceleration and gravitational field this case is identical to the case when the light ray moves across a rocket ship that is standing on Earth, and so the ray bends in gravitational field g, the same as the ray seen by observer in accelerating rocket ship. Since half of this angle comes from the curvature of space and the other half from the change in speed of light across light ray we take φ = Θ / 2 and get change in speed of light from (6) and (8) as
  dc(x)/dx = - g / 2c (9)

Quad Erat Demonstrandum

Vanishing gravitational force in free fall

So we've showed that energy (1), the total energy of a particle, is composed of its (in general huge) gravitational energy Eg = mc2 that produces a required gravitational force by changing itself along a distance due to the changing speed of light in curved space where the time is dilated, plus (in general tiny) kinetic energy Ek = [m(v) - m]c2. The value of gravitational force might be obtained by reversing the direction of the derivative of gravitational energy with respect to distance as in F = - dEg / dx.

It turns out that in the real world it is not a gravitational "pull" by "attraction" of some external body but inertial "push" by inertia of the particle in space where there is a change of internal energy of the particle as a function of displacement. So it is not a body attracting other bodies but other bodies are pushed by themselves towards an "attracting" body with this body not attracting them but just modifying the spacetime around herself by her presence in such way that those other bodies get themselves pushed towards the "attracting" body. "Attraction" is a figure of speech here and what is reall is the "push" towards this "attracting" center.

Now we need to do the test with free fall to see if energy of a particle in free fall doesn't change.

Since in a free fall in gravitational field with acceleration g, velocity v2 = 2 g x, where x is the distance by which the particle has fallen (in direction of its acceleration g) then substituting v2 into (2)
  m(v) = m / (1 - 2 g x / c2 )1/2 (10)

Differentiating with respect to x and ignoring small higher order terms
  dm(v)/dx = m g / c2 (11)

After substituting (9) and (11) to (4) we have a change of total (gravitational) energy of a free falling particle as
  dE/dx = 0 (12)
which shows that there is no change in the total energy of a free falling particle and so the whole kinetic energy of a free falling particle is the energy by which its internal energy (Eg = mc2) (a.k.a. "gravitational energy") diminishes.

This concludes the explanation of basics of Einsteinian gravitation. The rest of this page shows how conservation of energy is responsible for an effect called here the general time dilation that in turn is responsible for the Hubble redshift (illusion of accelerating expansion of space) and possibly also for the high redshift of quasars.


Illusion of accelerating expansion of space

If one assumes that the redshift of galaxies is due to their velocity (effect called "Doppler effect") then universe looks as if it were expanding and its expansion were accelerating. This is so since the light coming from distant galaxies has on average a smaller frequency (is "redder") than the light generated by the same sources close to observer.

The reason for this smaller frequency of photons was assumed by BBGR theorists to be a recessional velocity of galaxies causing redshift through Doppler effect but it turned out that the time at those galaxies runs slower than at observer and so the effect of the expansion of space has been simulated. Furthermore the simulated expansion looked as if the space were expanding with accelerating expansion.

This effect of the time running slower in deep space turned out to be necessity if energy couldn't be made out of nothing and the simple derivation of this effect, from the principle of conservation of energy, is presented below for a spherical light wave and a derivation with a different method for a planar light wave, with a more detailed explanation of the method of obtaining the result, is in Appendix 2.

The Hubble constant of Einstein's universe calculated for a spherical light wave

Introducing c the speed of light, G the Newtonian gravitational constant, ρ the density of dust of Einstein's universe, Ed = Eo - E, the gravitational energy acquired by the dust due to gravitational interaction between dust and photons (and so "lost" by the light after light of energy Eo got radiated out from a point in space at radial coordinate r = 0, due to the principle of conservation of energy) so the linear density of simulated "Newtonian gravitational force" acting on the dust of Einstein's universe inside the shell of spherical wave is
  4πGρ( Eo - Ed ) / c2 (13)
On the other hand this "linear density of gravitational force" is from its definition equal to
  d2E / dr2 (14)
Substituting "Einstein's cosmological constant" ΛE for 4πGρ / c2 and E for energy of photons one gets
  d2E / dr2 = ΛE E (15)
Solving this equation, with initial conditions E( r = 0 ) = Eo and ( dE/dr )( r = 0 ) = - sqrt(ΛE )Eo and selecting solution that has physical sense, one gets
  E = Eoexp[ - sqrt(ΛE ) r] (16)
or using "Einstein's radius of universe" to simplify the result since ΛE = 1 / RE2 the result is
  E = Eo exp( - r / RE ) (17)
It is not a strange coincidence that we get the radius of curvature of space through Newtonian math but a necessary result following from a fact that in universe in which energy is conserved, if the math is right (as the Newtonian math is), the relation between the Hubble redshift and the curvature of space must be as expressed by the above equation.

The Einsteinian interpretation of the above is of course the time running slower at a distance form observer according to relation
  dτ / dt = exp( - r / RE ) (18)
where τ is proper time at observed place in deep space and t is coordinate time (the proper time of observer). After differentiating it at r = 0 we get a relation between the time dilation in deep space per unit of distance (in radial direction) (d2τ / dt dr) and the curvature of space (1 / RE ) as
  d2τ / dt dr + 1 / RE = 0 (19)
which suggests that the spacetime is intrinsically flat.

In a general form it might look like (subject to verification by a tensor calculus expert)
  sqrt( R ) d2τi / dt drk + Rik = 0ik (20)
where R is Ricci curvature scalar, d's are partial, indexes i and k [1, 2, 3] denote spatial directions, in particular (i / dt) is general time dilation in direction i, and Rik is Ricci curvature tensor.

The redshift produced by the effect of general time dilation is
  Z = 1 - exp( r / RE ) (21)
and therefore it simulates the expansion of space with Hubble constant of this apparent expansion
  Ho = c / RE (22)

The obvious application of this effect is the calculation of density of space of our universe from the value of observed Hubble constant. The value of Hubble constant Ho = 70 km/s/Mpc implies density of space ρ = 6x10 -27 kg/m3 with only twice less relative accuracy as the Hubble constant is determined since Ho ~ sqrt(ρ). Another application might be calculations of densities and sizes of clouds of dust that quasars are located in from the redshifts of those quasars.

After splitting the Hubble constant into Taylor series the acceleration of this apparent expansion comes out as
  dH / dt = - Ho2 / 2 (23)
and it has been observed within a fraction of standard deviation already in 1998 by Supernova Project team and therefore predicted by Einstein's theory of gravitation (a.k.a. Einstein's general relativity) over 80 years earlier (see Einstein's photo at front page).

Since now Einstein's theory can't be falsified by observations as it predicts strict conservation of energy (non falsified yet), Einstein's universe (non falsified yet), and other (non falsified yet) observational results within one σ, (which in astronomy means a perfect agreement), then now we may suggest the metric tensor of spacetime not only non symmetric but also degenerate. Despite that, the resulting metric is quite decent
  ds2 = c2 exp(- r / RE)dt2 + 2sinh(r / RE)dtdr - exp(r / RE)dr2 (24)
shown above for one spatial direction only, since it is isotropic. For r << RE it approximates to Minkowski metric
  ds2 = c2dt2 - dr2 (25)

Now let's look at the CBR.

Cosmic Background Radiation (CBR)

This radiation cannot be just the redshifted starlight since then it could not have the black body spectrum that it has. It seems therefore that it has to be the radiation from non-luminous matter that is in thermal equilibrium with the redshifted starlight. If it is so then we can calculate the average size of the pieces of non luminous matter of universe. This is because the probability P of a photon hitting an obstacle of diameter D on it's way, and transferring to it its energy, which then becomes thermal energy, is approximately proportional to the area of the obstacle D2 and to the number of obstacles along the photon's way (inversely proportional to the cube of the distance L between obstacles P ~ D2 / L3. Since for a fixed mass density of the whole space (already determined from Hubble parameter) the distance between obstacles is proportional to their linear size L ~ D, the total probability of the photon hitting an obstacle becomes inversely proportional to the linear size of the obstacle: P ~ D2 / D3 ~ 1 / D.

So, knowing the temperature of the redshifted starlight, presumably re-emitted as a thermal radiation from the non luminous matter, and assuming specific density of the matter that the non luminous matter is made of, one may determine the average size of the pieces of non luminous matter of universe (see Appendix 3 for details).


Origin of Big Bang GR

The "expansion of space" has been suggested by astronomers because of galactic redshifts discovered by an American astronomer Vesto Slipher in the years following his discovery of blueshift of Andromeda in 1912. Most of these shifts turned out to be redshifts, with ratio of red to blue 4:1. Then these redshift, because of absence of Einstein's gravitation at the time, were interpreted by astronomers as Doppler redshifts that were taken by theorists for a proof that universe is expanding. In 1931 Georges LeMaitre proposed an explanation of this expansion, known later as the Big Bang.

In the Big Bang "theory" it has been assumed (after Einstein, who changed his opinion only in 1950 when he proposed a non symmetric metric tensor) that the geometry of spacetime is pseudo Riemannian and that the metric tensor of spacetime is symmetric. At such conditions it is impossible to have redshift of photons that move along closed loops in stationary space (Hubble type redshift). Therefore it has been considered an established fact that the Hubble redshift is a result of the expansion of universe and that in a stationary universe there wouldn't be any Hubble type redshift.

But it has been overlooked that the principle of conservation of energy implies the existence of dynamical friction of photons which would cause Hubble redshift anyway. Therefore the metric tensor of spacetime couldn't be symmetric. Einstein realized this only in 1950 when he proposed a non symmetric metric tensor for the spacetime.

In the meantime it was the 1929 line of reasoning of Fritz Zwicky (1898-1974) who maintained that because of asymmetry of gravitational interaction between photons and the universe there must be a Hubble type redshift in any light. It was called tired light effect but ignored in favor of the expansion of universe by the gravity physicists for whom it was too exotic an effect not fitting in any way the general relativity since they strongly believed, against reason, in Riemannian geometry of spacetime with its symmetric metric tensor.

Zwicky didn't know how to calculate the redshift properly and so he didn't get results that he could use to convince the opponents of tired light effect. It was the common problem of many astronomers and astrophysicists who apparently tried to do calculations in Newtonian, approximate (and illegal) way to get the tired light effect.

Apparently the first guy who calculated the redshift of photons rigorously, not using any Newtonian approximations and so he got in 1985 the right result (after many years of trying to do the same approximate Newtonian calculations) seems to be me. I was not a physicists though but a sculptor, therefore my credibility was zero, so no one (except referees) wanted ever to see my result. The referees however didn't understand Einstein's gravitation. So their seeing my results didn't help. For some reason they couldn't imagine that curvature of space implies time dilation, which Feynman said "it would be kind of crazy" if it didn't. Well, referees were no Feynmans and for some reason they didn't see the connection between curvature of space and time dilation. As I said, their understanding of relativity had been rather poor, which I'd seen from many discussions with them, which I used to learn general relativity from (as accordning to a Chinese proverb "a wise man can learn much more from a stupid then a stupid from a wise").

The referees didn't find any formal problems with my result but since none of them had any advanced knowledge on gravitation all recommended the rejection of the solution for the reason of my not proposing any new physics (which they thought was necessary to solve such a profound problem that even they didn't understand). So the first results solving the problem exactly along Einstein's lines of reasoning were rejected by Nature, Physical Review Letters, Science, The Astronomical Journal, and even Nuovo Cimento (defunct since then), not to mention many popular science journals like Scientific American and Physics Today.

Zwicky's idea was not even mentioned in MTW who being gravity physicists might have not even known about dynamical friction, and maybe that's why they had never calculated its value for photons assuming zero value as best fitting their purpose. Had they calculated the value of dynamical friction of photos there wouldn't be a need to assume that the universe is expanding and that energy can be created from nothing, not even to mention that the true nature of quasars could be discovered decades earlier to satisfaction of Halton Arp (an astronomer) and Jayant Narlikar (a pure mathematician) who seem to be the most informed opponents of the expanding space hypothesis.

The plot thickened when Arthur Eddington suggested in 1929 that according to the general relativity (as he understood it) Einstein's universe is unstable with respect to the small fluctuations of radius of curvature of space and so the universe has to either expand or contract. It is an analog of suggestion by some gravity physicists that the orbits of planets are unstable with respect to small fluctuations of their radii since centrifugal force increases with radius and therefore leads to even greater increase of the radius (which would be true if other factors, like conservation of angular momentum, didn't take part in this phenomenon).

So Eddington's suggestion may be ignored as long as all the factors taking part in the stability of universe are not taken under consideration. Besides, it is risky to tell how a system of 1011 galaxies is going to behave if we don't know yet how to predict analytically the behavior of three bodies.

However, most gravity physicists lead by Gamov (1904-1968) and later by Wheeler embraced the idea, baptized "Big Bang" by Fred Hoyle (1915-2001) that was proposed in 1931 by George LeMaitre, a priest of Jesuit background, as the only possible way of creation of universe.

Since the Hubble redshift was already included in the so called Big Bang general relativity as a result of expansion of space, and the expansion of space became the basis of the Big Bang GR, the conservation of energy had to be dropped to avoid the contradiction within the theory and the dynamical friction of photons had been assumed exactly zero to the bewilderment of those astronomers who still believed that energy is conserved.

In the Big Bang GR the contradiction between expansion of universe and the conservation of energy had been decided by the theorists against the conservation of energy. The dynamical friction has been assumed to be limited only to Newtonian physics despite that Einsteinian physics as more general should explain all observed Newtonian effects. This limitation of dynamical friction to all particles except photons in the Big Bang GR is an equivalent to an assumption that while all other particles are subject to the principle of conservation of energy and so to the dynamical friction the photons aren't (they are supposed to have zero redshift in a stationary universe), and so, while photons are moving through the universe, carrying energy and modifying the gravitational field, the energy needed to compensate for the dynamical friction of photons is assumed by theorists like Wheeler and others to be created from nothing. It is a point where divine intervention into the affairs of universe is to be assumed by the gravity physicists.

It has been tacitly assumed by astronomers (in order to understand the gravity physicists) that this energy is so small that assuming that it is created from nothing won't change any observational results [source: Dr. Bohdan Paczynski, astrophysicists].

Actually there exists even a back-of-envelope Newtonian calculation that convinces astrophysicists that this is really the case. Consequently the amount of this energy has been never calculated, just assumed on the basis of this back-of-envelope calculations to be negligible. Unfortunately for the Big Bang GR it isn't negligible and consequently it is a fatal flaw of this hypothesis. Obviously one has to return to Einstein's GR with global conservation of energy and consequently with non symmetric metric tensor and possibly assume non Riemannian geometry of spacetime.

I have been explaining many mysterious features of cosmology as simple relativistic effects of Einstein's gravitation, explaining physics of the illusion of accelerating expansion of space, providing calculation of Hubble constant of apparent expansion of space and its (apparent) acceleration (confirmed by observations after 1998 with data from SN Project), predicting the Density of universe, estimated already by astronomers within a fraction of order of magnitude.

The calculations narrowed the uncertainty of the density of space to 16% standard deviation (twice the uncertainty of the Hubble constant). Even the average size of pieces of non luminous matter of universe has been provided. And all was done from first principles and Einstein's general relativity.

It has been shown that restoring the principle of conservation of energy as a valid physical principle and with it restoring the dynamical friction for photons allows to drop the assumption that the universe is expanding, however not, as it might have been expected, through restoring the Newtonian idea of tired light proposed by Zwicky. It has been done by demonstrating that in a world where energy is conserved the dynamical friction of photons is a relativistic effect of general time dilation. An effect of the rate of time dilation compensating for the curvature of space for the reason of inability of nature to produce energy from nothing.

Einstein's theory, by separating itself for good from the magic of expanding space, became again a physical theory explaining all the controversial or not understood elements of Einsteinian physics. It showed the location of gravitational energy, and by this the origin of gravitational force as the minus derivative of the internal energy of particle with respect to displacement, (-d/dx)[m c2(x)] (where m is the mass of particle, and c(x) is coordinate speed of light) which makes the gravitational energy the same as the internal energy of the particle. It shows the reasons for the Hubble redshift, and so it explains the illusion of accelerating expansion of space. Possibly it explains also the surprisingly high redshifts of quasars that, as Halton Arp has insisted, are associated with galaxies of much smaller redshifts and so not even located at the distances assumed by the theorists.

Because of all those things there are several differences between Einstein's GR and Big Bang GR. They are in assumptions about the real world and necessarily in conclusions from these assumptions. These assumptions and conclusions are specified separately in the two tables below:

Differences between Big Bang GR an Einstein's GR

ASSUMPTIONS Big Bang GR Einstein's GR
reason for gravitation geometry of spacetime
conservation of energy invalid valid
speed of light constant throughout the whole space local is constant c, non local (coordinate speed of light) depends on displacement within reference frame: c=c(x)
[see Basics ...]
accelerating expansion of space fact due to dark energy see
conclusions
metric tensor of spacetime expanding, symmetric, Riemannian

CONCLUSIONS Big Bang GR Einstein's GR
accelerating expansion of space see
assumptions
illusion due to conservation of energy predicting Hubble parameter as H0 = c / RE where c is speed of light and RE is Einstein's radius of curvature of space
[see Appendix 2]
metric tensor of spacetime stationary, non symmetric and degenerate, (non Riemannian)
[see Illusion ...]
reason for Hubble redshift Doppler shift due to recession of galaxies conservation of energy
[see Appendix 2]
reason for CMBR redshifted light from Big Bang absorption of redshifted starlight by non luminous matter of universe and re-emission at temperature of thermal equilibrium 2.7oK
[see Appendix 3]
reason for high redshift of quasars speed of recession conservation of energy in clouds of dust, Z = exp (r sqrt(4pGr) / c) - 1 where Z is redshift, r is radius of cloud, G is gravitational constant, r is density of cloud, c is speed of light
[see paper (in PDF format) The general time dilation: relativistic redshift in stationary clouds of dust]
reason for gravitational force "acceleration of space" Fi = - (d/dxi) E0(x), where E0(x) is internal energy of particle depending on position in space (x)
[see Basics ...]
gravitational (potential) energy ? the internal energy of particle E0(x) = m c2(x), where m is mass of particle and c(x) is coordinate speed of light depending on position in space (x)
[see Basics ...]
location of gravitational energy ? location of gravitating particle: x
[see Basics ...]
density of space ? 6x10-27 kg/m3
[see Appendix 2]
acceleration of expansion in terms of dH/dt and H0 ? dH/dt = - 0.5 H02
[see Appendix 2]
acceleration of space probes ? - 7x10-10 m/s2
[see Appendix 2]
average size of pieces of non luminous matter ? order of one meter
[see Appendix 3]
angular size of galaxies as function of distance from observer ? should have minimum at redshift Zo < exp(π / 2) because of the apparent accelerating expansion of space that is closed into a 3-sphere

The areas that a theory has no answers for are marked with question marks. All of them are in the Big Bang GR and it suggests that Einstein's original theory is OK while the Big Bang GR is wrong. Therefore we might assume that gravitational force and energy may be explained according to the old Einstein's theory based on conservation of energy and explain them as such. Therefore we seem to be justified in explaining gravitation as it is explained in the following section.


Observational evidence for Einstein's GR as opposed to Big Bang GR

Variable Einstein's GR predictions Observed value σ(sigma) Units
theoretical numerical
Radius of curvature of space RE 4.3 ? ? Gpc
Hubble parameter at Earth Ho = c / RE 69.6* 69.6 2.8 km/s/Mpc
Acceleration of space probes Pioneer 10 and 11 ao = c2 / RE 7 8.7 1.3 10-10 m/s2
Density of universe
(of "gravitational energy")
ρ = c2 / (4πGRE2) 6 5.5 4.5 10-27 kg/m3
apparent acceleration of expansion of space in Ho2 dH/dt = 1 / 2 0.5 0.45 ? - Ho2
redshift of minimal angular size of galaxies [verify] Zo < exp(π / 2) < exp(π / 2) 1.6 ? 1
* assumed value
    Notes
  • Most of the observed values are functions of the radius of curvature of space a.k.a. Einstein's radius (RE) that is adjusted so that Ho comes out exactly as observed.
    In the equations for theoretical predictions the unspecified variables are: G is Newtonian gravitational constant, c is speed of light, t is coordinate time.
  • The acceleration of the apparent expansion of space is made a function of Ho for easier comparison with the observed value given as function of Ho.
  • Five of the above values are predicted by Einstein's GR. None of the observed values is predicted by the Big Bang GR.


Glossary of terms pertaining to gravitation (and some added for entertainment).


Abandonment of symmetric metric tensor. Einstein might have realized in 1950 that symmetric metric tensor implies violation of the principle of conservation of energy and abandoned it. "The answer on which the theory under discussion is based is that the symmetrical tensor field must be replaced by a non-symmetrical one. This means that the condition gik = gki  for the field components must be dropped" [Einstein, "On the Generalized Theory of Gravitation", Scientific American, April 1950]. Einstein's abandonment of symmetric metric tensor has been ignored by authors of MTW's monograph "Gravitation" who apparently didn't mind the violation of the principle of conservation of energy.

It turns out that to apply Einstein's field equation to explain gravitation in a sensible way that doesn't contradict any other physics (e.g. the principle of conservation of energy) it is necessary to assume that the metric tensor of spacetime is non-symmetric and degenerate (to prevent its diagonalization). The observational data imply then that the expansion of universe is an illusion. Luckily a non symmetric tensor has more independent components so they are enough to provide for the illusion of expansion. This non-symmetry of metric tensor provides for an effect not yet discovered by astrophysicist which I call general time dilation. Without it any gravitational interaction with any moving object could be used to create energy from nothing in a similar way that energy is created in the tidal power plant, by the earth's oceans moving in relation to the moon. In case of the earth-moon system the part of rotational kinetic energy of the earth is converted into electricity in a tidal power plant, and part is transferred to the moon making it flying higher and higher. So in general the effect puts a small Newtonian drag on any moving object in the universe that which is a Newtonian counterpart of the relativistic effect that is observed in the real world as reddening of light called Hubble's redshift. If we apply that drag to particles of light (photons) it turns out that they really look as if they encounter such drag. The astrophysicists interpret this effect as a Doppler effect caused by recession speed of galaxies and consequently as the evidence that the universe is expanding while this effect is caused only by the time running the slower the farther we look as required by a non-symmetric metric tensor and relation between time and space as expressed by identity sqrt( R ) (d / drk)(dτ / dt)i + Rik = 0ik where R is Ricci curvature scalar, τ is proper time at observed place in deep space, t is coordinate time (the proper time of observer), r distance from observer to observed point in deep space, Rik is Ricci tensor of curvature of space. The effect has been also observed in the alleged accelerating expansion of space and in the behavior of space probes Pioneer 10 and 11 but since astrophysicists still think that the metric tensor is symmetric they can't explain the behavior of the space probes and call the effect "anomalous". It is all that there is to the mystery of why the universe looks as if it were undergoing accelerating expansion.


Action at a distance is an action through empty space without any carriers of this action that, as it is now known, have to carry energy from one object to another since energy has to be carried on some carrier of energy, e.g. photons, gluons, or whatever, but can't get through "empty space" which would be analog of energy disappearing in one place and appearing without any good reason in another, which would contradict one of the most important principles of physics, the principle of conservation of 4-momentum. Einstein called action at a distance "spooky", as if caused by "ghosts" in which Einstein, being an atheist, didn't believe.


Anaxagoras is a Greek who said "nothing comes from nothing".


Angular diameter of galaxies as function of distance of those galaxies from us shows a minimum at about redshift Z = 1.6 and it seems to confirm Einstein's idea that the universe is a 3-sphere of "Einstein's radius".


Applied mathematicians are guys who can handle equations better than computers though not the same fast so they may never be able to replace computers, however one of their subspecies, gravity physicists, hope to replace physicists one day.


Atheism is a symptom of critical mind and a belief, that the universe is not controlled by supernatural beings (like "ghosts" or even Santa Claus) but rather by a string of events each possible to be explained without an action at a distance of some "ghosts". It is a general disbelief in existence of supernatural as e.g. the creation of matter from nothing would be. That's why it may be important for theists to "prove" that creation of matter (or energy) from nothing, as it is assumed in BBGR, is possible. Atheists didn't believe neither in creation of something from nothing, nor in ghosts, nor in Santa Claus. They might believe to have another beer though...


Axiom is a feature of a phenomenological theory, an assumption that can't be proved within the given set of assumptions of a phenomenological theory of which it is an axiom. Unlike in a physical theory where it has to be checked all the time whether its assumptions are true, one does not bother with truth or falsehood of an axiom. It is admitted as if it were "obviously true". If it turns out to be false the hypothesis built on it collapses as a magical hypothesis. E.g. what happened to the Big Bang hypothesis after it turned out that contrary to BBGR assumption the universe is not expanding.


Big Bang general relativity. "Big Bang" is a term coined by Fred Hoyle (1915-2001) in 1950 to ridicule the hypothesis that the whole matter of universe has been created about 14 billion years ago as a small dot, much smaller than any dot over i, and it has been expanding ever since (Wheeler, 1973). The hypothesis has been accepted by the majority of gravity physicists though (at least by those devoid of sense of humor) and included into their version of general relativity in which energy in "negligible amounts" (how "negligible"?) is created. Since about the half of the 20th century the consensus of gravity physicists considered BBGR to be true, and papers falsifying this cosmology for violation of the principle of conservation of energy were recommended for rejection by referees of scientific journals (gravity physicists themselves) with editors complying with the recommendations. There was even a proposal directed to Alan Guth (one of believers in this cosmology), to create another universe in a lab by creating proper conditions for such an event (the proposal was witnessed by me while driving Alan, and his friend from Columbia U, to some meeting downtown Boston, MA since both guys were too drunk to drive themselves after the weekly "Early Universe Seminar" at Harvard U in Cambridge, MA, for which Harvard U provided free beer to promote science).

BBGR explains the Hubble redshift as caused by the expansion of universe and because of this it postulates constant creation of energy in "negligible" amounts, just sufficient to compensate for the dynamical friction of photons that would exist in the world in which energy is conserved but can't exist in spacetime with symmetric metric tensor postulated by Wheeler's physics in which the conservation of energy is dropped, presumably to allow the creation of material things from nothing and to allow to reconcile science with religion. This creation of energy must happen through divine intervention to keep the metric tensor symmetric since there is no other mechanism available in physics to create energy from nothing. The value of this dynamical friction has been never calculated by BBGR theorists just assumed as negligible as it should be in a spacetime with assumed symmetric metric tensor. When I calculated the dynamical friction of photons in 1985 it turned out to be as it should be in Einstein's universe. The author drew from it a very unpopular among BBGR gravity physicists and astronomers conclusion that our universe is Einstein's universe (Jastrzebski, 1985) (the Hubble constant coming out as 70 km/s/Mpc) for which he was banned for life from several moderated Internet fora losing connection to scientists who still believe in a scientific explanation.

Richard P. Feynman in his comments on gravity physicists (point 4 of his critique) called gravity physicists idiots for assuming that an "obvious and correct fact" [like the principle of conservation of energy] "accepted and checked for years, is, in fact, false (these are the worst: no argument will convince the idiot)". In this controversy I support Einstein and Feynman, while theists, at least those from Kansas, consider attempts to falsify the Big Bang hypothesis "an atheist plot".


Conservation of 4-momentum means that in an isolated system (one with no connection to the outside of it) there is always the same fixed amount of energy and 3-momentum (momentum in 3 spatial directions) making together so called 4-vector of 4-momentum. Since all 4 components of this 4-vector are conserved separately no energy (the first component of 4-vector) in this isolated system can be created or destroyed. This assumption is dropped in Big Bang hypothesis to accommodate for a possibility that the universe was created 14 billions years ago and is expanding ever since. The Big Bang hypothesis is called rather illegally general relativity but it is only a magical hypothesis based on Riemannian geometry describing quite inaccurately the Einstein's physics of gravitation trying to make a phenomenological theory out of it in which energy is not conserved (which as far as we can tell is not happening in the real world). The whole universe is necessarily an isolated system as there is nothing outside of it. Here we are considered only with accurate description of Einstein's physics, and so not with description of the Big Bang theory. We are showing in this article that (i) conservation of energy is a basic part of Einstein's theory of gravitation without which it isn't working at all and (ii) that with the conservation of energy being a valid assumption it is not necessary to assume that the universe is expanding. The conservation of energy, dropped in BBGR, is the main difference between Einstein's physical and Big Bang's phenomenological (based on the axiom of creation and expansion) cosmologies from which all the other differences follow.


Copernican Principle says that space is (roughly) homogeneous. The "Perfect Copernican Principle" states that the Copernican Principle is time independent. Einstein's general relativity states that our universe behaves as required by the Perfect Copernican Principle.


Cosmic Microwave Background Radiation before 1963 was thought to be the thermal radiation, of temperature about 3 K, of the non luminous matter of universe being in thermal equilibrium with redshifted starlight. It was measured by the radio engineers from the density of noise that the radio engineers noticed as coming from the sky and it couldn't be assigned to any known source of noise. They assigned it to the thermal energy of non luminous matter of universe assuming that the temperature of the universe was about 3 K (accordring to the author's recollections of his pre 1955 high school lecture of a radio technology textbook and that's why the author knew "since always" that the temperature of universe is about 3 K and he was surprised that it has been "discovered" only in 1963 by Wilson and Penzias).


Cosmic Microwave Background Radiation after 1963 (a.k.a. CBR or CMBR) is radiation that comes from the sky as black body radiation of temperature 2.716 K being most likely the thermal radiation of non luminous matter of universe being in thermal equilibrium with redshifted starlight as it was assumed before Wilson and Penzias "discovered" that it might be the radiation left in the universe as the result of the Big Bang event for which "discovery" (see "Cosmic Background Radiation before 1963") they got Nobel Prize in 1978.


Critical mind is a mind that does not believe in anything that is not confirmed by a reliable experiment or a reliable observation. Taking also under consideration that "reliable" depends on interpretation which may be source of errors in otherwise neat theory. Newton's theory of gravitation once was such a neat theory (not to Newton himself though, since he had a critical mind himself and he didn't believe in "action at a distance") that his theory indicated. He turned to be right (there is no "action at a distance" in gravitation). The list of things that critical minds don't believe in would be too long for this article so it is skipped here.


Curvature of space means that at some places of universe there is "more space than at a point far enough from any material objects". It means that within the same 2-sphere of the same surface area, there is a greater amount of space (greater volume of space) than at a point far enough from any material objects (e.g. the same 2-sphere can hold greater amount of water). Furthermore it turns out that whenever there is "more space" also the time "slows down" in such way that product of the amount of space and the amount of time ("volume of spacetime") is constant. It means that the spacetime of universe is intrinsically flat. This is a necessary result of the principle of conservation of energy. So one may say that curvature of space, or concurrently, the time dilation, is the result of one of these features and the other is the result of the inability of nature to make energy from nothing.


Curvatures of spacetime are numbers that for each event in spacetime tell how much space at this event is curved and time is dilated in relation to events far away from any material object (where space and time are "flat" i.e. the same as in Euclidean spacetime). In Einstein's spacetime the dilated time (less time) implies increased amount of space in such way that their product (volume of spacetime) is the same in the whole universe meaning that the spacetime of universe is intrinsically flat. Einstein's gravitation is considered having flat geometry (not by MTW though).


Dark energy. Hypothetical energy allegedly discovered in 1998 by Supernova Project team of astronomers working on confirmation of predictions of the Big Bang theorists that the expansion of universe is decelerating. The team discovered that the observations are opposite to what was predicted by the Big Bang theorists. The expansion of universe instead of looking decelerating looks accelerating as predicted by Einstein's theory and also with the predicted value of acceleration. Then this discrepancy has been blamed by Big Bang theorists on an unknown yet "dark energy", set most likely by nature (that, according to Feynman, takes always Einstein's side) to destroy the elegance of Big Bang hypothesis. The properties of this hypothetical "dark energy" are investigated ever since by the Big Bang theorists.


Doppler effect. The common effect of changing the length of any wave when the wave is emitted by a moving source or received by a moving observer. When the source of wave is approaching the observer the observed wavelength gets shorter (so called "blueshift" as lightwave becomes then more blue) and when it moves away from observer it gets longer (so called "redshift" as lightwave becomes then more red).


Dynamical friction of photons is a relativistic effect of photons reaching the observer with a redshift depending exponentially on the distance that they travel, dτ / dt = exp( - r / RE ), where τ is proper time (at source of light), t is coordinate time (at observer), r is distance from observer to source of light, RE is Einstein's radius. The reason for this effect is slowing of the time rate at the source of this light called here the general time dilation as opposed to gravitational time dilation. It is named dynamical friction (of photons) through analogy to the dynamical friction, a Newtonian effect of the dispersion of kinetic energy of things that move through the universe and interact gravitationally with its matter losing in the process the kinetic energy to the matter of universe (the effect opposite to slingshot effect used to accelerate cosmic probes while rejecting them from the Solar System). Within the Newtonian magic (phenomenological description of gravitation by Newton) the dynamical friction of photons is represented by the tired light effect in which the photons move against dynamical gravitational field c2/ RE, where c is speed of light, as it might be observed in "anomalous" acceleration of space probes Pioneer 10 and Pioneer 11.


Einstein's cosmological constant, a.k.a. Cosmological constant or Λ is a constant of Einstein's field equation and its nature is similar to constant of integration that needs to be determined while calculating integrals. The value of this constant has been a subject of Big Bang controversy since the value calculated by Einstein in 1917, ΛE = 4πGρ / c2, implies stationary spacetime (idea supported by about 5% of cosmologists, astronomers, and me) while most astronomers and gravity physicists assume that the Hubble redshift is the Doppler shift caused by recession of galaxies which implies that the universe is expanding. Therefore the value calculated by Einstein is the very value not accepted by most astronomers and gravity physicists. They assume various values of Λ consistent with expanding space. After discovering cosmological constant Einstein was constantly bothered by visits from cosmologists who kept proposing their pet values of cosmological constant. Finally Einstein told his secretary not to let in anyone who wants to talk to him about the universe (source: prof. Roy Glauber, Einstein's co-worker, telling the story to me). Then Einstein resolved the Big Bang controversy with a joke, telling George Gamov that the discovery of the cosmological constant was "the biggest blunder of my life". The cosmologists (at least those deprived of sense of humor) treated Einstein's joke as his admittance that he was wrong discovering the cosmological constant and they assumed its value as zero (see 1973, MTW p. 411). Before 1998 the gravity physicists supported by Stephen Hawking who advised to try to make finally some observations confirming the Big Bang assumptions (namely that the cosmological constant doesn't exist, that it was just "Einstein's blunder") and so the expansion of universe is decelerating, as required by the zero value of cosmological constant. Around 1998 it turned out that the value of cosmological constant can't be zero since the alleged expansion of universe, instead of slowing down looks like speeding up. Then the gravity physicists proposed the existence of "dark energy" of unknown yet properties as the way out of discrepancy between the Big Bang theory and observation of accelerating expansion. The nature of "dark energy" is investigated ever since, providing interesting material for scientific papers. Especially interesting to the future historians of science.


Einstein's radius a.k.a. Einstein's radius of universe, RE = c / sqrt(4πGρ), where c is speed of light, G is Newtonian gravitational constant, and ρ is mass density of space. It is the radius of 3-sphere being the 3-space of Einstein's universe, about 4.3 Gpc. The relation between cosmological constant of Einstein's universe, ΛE, and Einstein's radius is ΛE = 1 / RE2.


Einstein's theory of gravitation a.k.a. Einstein's general relativity, a theory of gravitation that explains the gravitational force not as some magical force of "gravitational attraction", that even Newton who didn't believe in miracles refused to accept (for its implied action at a distance) but as a force resulting from the internal energy of the particle itself, diminishing along certain direction because of curvatures of spacetime. Gravitational force in Einstein's theory is therefore a force pushing a particle in a direction of the diminishing internal energy of particle. The excess energy (excess energy resulting from diminishing internal energy) is changing into the kinetic energy of movement of particle with the total energy of particle being always the same. In which we may see the working of the principle of conservation of energy that can't be violated in a scientific theory and so it can be use to tell a scientific theory from a fiction. The curvatures of spacetime is all that is needed to explain the shape of diminishing energy of particle in space and in turn this shape is described by the math (or rather geometry) of Einstein's theory. That's why Einstein's theory is called a "geometric theory of gravitation". There are no external ("fundamental") gravitational forces acting on particles. All is just decided by the curvatures of spacetime.


Einstein's universe is a stationary (i.e. neither expanding nor contracting) model universe described by Einstein's field equation with Λ = ΛE "Einstein's value of cosmological constant". Einstein discovered this value in 1917. It was rejected by the theorists of BBGR since such value stabilizes the field equation and makes the model stationary contrary to the opinion of BBGR theorists who thought at the time that the universe is expanding.


Empty idea is idea of something that does not exist in the real world, as e.g. angels, elves or unicorns, that we can imagine, even draw them, but it doesn't make them existing objectively as separate entities except as (empty) ideas. Many things which existence was taken for granted turned out to be empty ideas. E.g. absolute simultaneity: idea of two events happening in two various points in space "simultaneously" is empty (since there may be observers for whom one event is earlier than the other and observers for whom it is just opposite, so simultaneity can be only relative, in relation to a particular observer) so it never happens in the real world that events happen "absolutely simultaneously" or in other words it has no meaning for nature which one is earlier. Only collision (one event happening in the same point in space) has meaning for nature. Lack of absolute simultaneity was an important discovery of Einstein's relativity. "Action at a distance" is another empty idea.


E = m(v)c2 is an identity discovered by Einstein in which E is total energy of a particle, m(v) is its inertial mass and c is invariant speed of light. Some of this energy is called "kinetic energy" if it is due to linear motion of the particle with velocity v, but if it happens to be due to some rotations within the particle that aren't visible outside of it then it is called "internal energy" or the "invariant energy" of the particle since it is the same for all observers of the particle of this type regardless of their total energy (internal energy + kinetic energy). Since around half of 20-th century m started to mean the rest mass (invariant mass, formerly called mo), the equation E = mc2 became only equation for internal energy of particle and total energy had to be changed to E = m(v)c2(x) to distinguish m(v) from m while m(v) is related to m by equation m2(v) = m2 / (1 - v2 / c2), and to distinguish c(x) from c, which now means speed of light that a particle sees itself, at its actual position in space and not necessarily what observer sees which is his "coordinate speed of light". The value c(x) depends on the curvature of spacetime and is related to c by equation c2(x) = c2goo1/2 where goo is the time-time component of the metric of spacetime). Total energy of a particle is still an invariant number which means that it does not change while the particle changes, in a free fall, its position in relation to a coordinate system.


Event is a "point in (4 dimensional) spacetime" that has four coordinates: three spatial coordinates (telling where it happened) and one temporal coordinate (telling when it happened).


Evolution is something that is responsible for creation of all species, also those extinct, but many of them being just auxiliary structures for developing other more sophisticated structures. Evolution acting randomly not always succeeds as it happened e.g. with H. sapiens who has been evolved, with original purpose of converting bananas into proteins to feed with them the saber-toothed tiger, but something went wrong with that scheme and the saber-toothed tiger got extinct by H. sapiens whose brain evolved faster than that of the saber-toothed tiger and survived not as evolution intended, as the saber-toothed tiger's food, but as a pest destroying the other species which evolution planned to populate the planet Earth with, creating a paradise on Earth. Luckily H. sapiens managed to invent also H. bomb that soon will wipe out the H. sapiens from the face of the Earth and so the evolution will be able to start again from scratch, with its purpose being easier to achieve because of the enhanced radiation that H. sapiens will leave on the Earth as its main achievement. So maybe the real purpose of creation of H. sapiens was not to provide proteins for the saber-toothed tiger but to accelerate the mutations by releasing more radiation? Then the evolution might not be as stupid as some of us think it is but it is doing the best it can to bring the paradise on Earth around? And so we shouldn't call it "it" but more respectful name like "SHE" and start believing in "HER"? Another bad news for theists who don't believe in HER but aren't listening to Pascal's advice that believing is safer than not believing.


Einstein's field equation is a set of 10 differential equations describing the geometry of the spacetime. The equations may be combined together in tensoral form as follows:
Final version (of 1917, with Λ): Rαβ - (R / 2 - Λ) gαβ = 8πTαβ
where Rαβ is Ricci tensor, gαβ is metric tensor of spacetime, Λ is cosmological constant, and Tαβ is stress-energy tensor
Original version (of 1915, "elegant"): Rαβ - (R / 2) gαβ = 8πTαβ (all variables as above)
Wheeler considered Einstein's original version of field equation "elegant" and Λ "the biggest blunder of Einstein's life" since, as he has written in his "Gravitation" MTW p. 411): "had Einstein stuck by his original equation, he could have claimed the expansion of the universe as the most triumphant prediction of his theory of gravity". Einstein said "If you are out to describe the truth, leave elegance to the tailor".
Comment: Had Einstein stuck by his original equation as Wheeler advised, he would make the same fool of himself as Wheeler and his team of Big Bangers did when it turned out in 1998 that the alleged expansion of the universe looks accelerating instead of decelerating as the original equation of 1915 "predicted".

It would be even worse when it turned out that the universe, as Einstein's universe, is not expanding at all since its expansion would violate the principle of conservation of energy. Einstein, being a patent office clerk and an atheist might have not supported the violation of conservation energy since the Patent Office had a policy of rejecting applications for perpetual motion machines without even testing their viability, and atheists didn't believe in supernatural, while Wheeler, being one of 126 dopes attending the World Conference on Gravity, as his student Richard P. Feynman disclosed in the book "What Do You Care What Other People Think?", might consider the ability of creation of energy from nothing, a necessary attribute of God and even of his angel whose picture blowing a horn adorns page 1218 of his "Gravitation".

It might be good to put more light on Big Bang controversy by mentioning here that according to the University of Kansas gravity physicists, Einstein's universe is an atheist plot and "The Templeton Foundation" gave 1.6 million dollar award to a cosmologist Michael Heller "in recognition of scholarship and research that has pushed at the metaphysical boundaries of science.".


Feynman's opinion about gravity physicists have been provoked by his attendance at the World Conference on Gravity. It illustrates Feynman's disappointment with qualification of gravity physicists as scientists.


First principles. Calculations from first principles are ones that start from the established laws of physics without making assumptions about any particular model.


Flat geometry means that a certain aspect of the space under consideration is the same everywhere, as in Euclidean flat space. A convenient thing for measuring flatness of 2-dimensional (2D) surface may be the ratio of a circumference of a circle on this 2D surface to radius of this circle. If it is always 2π the surface is flat. It may be also the ratio of area of circle to radius squared. If it is always π the surface is flat. For 3D space it might be more things: as above the ratio of circumference to radius and the ratio of area of surface to radius squared (2π and π respectfully for all circles imply flatness) and also the ratio of area of surface of 2-sphere (our regular 3D sphere) in this 3D space to the radius of this 2-sphere squared (if always 4π the space is flat) or the ratio of 3-volume of 2-sphere to the cube of radius (if always 4π/3 the space is flat). For 4D spacetime it may be even more things.
It seems that spacetime of our universe is flat but the space is surely curved and its radius of curvature is about 4.3 Mpc since speed of light divided by this radius turns out to be 70 km/s/Mpc. For space being curved and spacetime being flat the 4th dimension (our "time") must fit the curved 3D space so that the 4-volume remains the same as in Euclidean 4-space (our "spacetime"). So the flatness of spacetime by adjusting the time rate to the curvature of space seems to be the sufficient reason for the illusion of accelerating expansion of space. Especially when parameters of this apparent expansion predicted with Einstein's theory fit the observations.


General time dilation is an effect valid for any space containing energy in any form due to the effect of interrelation of time and space in Einstein's general relativity (not present in BBGR though). It is an effect of proper time (τ) running outside an observer slower than observer's coordinate time (t). In homogeneous space of Einstein's universe it is proportional to the exponent of distance from the observer to the observed point in deep space (r), and inversely proportional to the radius of curvature of space (RE or Einstein's radius). It is expressed by equation dτ/dt = exp(- r / RE). The effect, in agreement with perfect Copernican principle, shows up for any observer in the universe, at any time, supplying the reason for the Hubble redshift. The observed Hubble constant (Ho = c / RE) of 70 km/s/Mpc implies the density of stationary space of 6x10 -27 kg/m3, which is roughly what is observed in the universe. Calculations based on conservation of energy while calculating the dynamical friction of photons indicate that this effect reflects the curvature of space in such way that the tensoral sum of three dimensional Ricci tensor of the curvature of space and the tensor of general time dilation (known as H tensor) vanish.


Gravitational energy is something that used to be called internal energy of a particle E = mc2(x), where m is mass of a particle and c(x) is coordinate speed of light. The derivative of this energy with respect to displacement turned out to be gravitational force with negative sign (dE/dx = -F) then E = mc2(x) satisfies the definition of gravitational energy.


Gravitational force in Einstein's theory is the same as in Newton's theory: F = mg, where m is mass of a particle and g is acceleration of the particle in free fall. Also it is the derivative of gravitational energy with respect to displacement with minus sign (F = - dE/dx). However unlike in Newton's theory which is a mathematical theory in which gravitational energy is a mathematical quantity defined only with accuracy to an arbitrary constant, in Einstein's theory it is a precisely defined physical quantity E = mc2 localized at the particle itself (a fact possibly not known yet to Einstein himself). The derivations of gravitational force and energy are in section "Basics of Einstein's gravitation".


Gravitational time dilation is an effect of time running slower at the source of light located at an object containing energy in any form (e.g. planet, star, or galaxy). The effect is approximately (for masses M << c2 r / G) proportional to the amount of the energy located in the object (contained in its mass M) and inversely proportional to the distance form the object: dτ/dt = 1 - G M / c2 / r, where τ is proper time (at source of light), t is coordinate time (at observer), G is Newtonian gravitational constant, c is speed of light, r is distance from observer to the source of light.


Gravitational redshift is redshift caused by the time running slower due to gravitational time dilation


Gravity physicists are subspecies of applied mathematicians who due to their ideas about physics believe that physics can be replaced by math. See Richard Feynman's impressions from his participation in a World Gravity Conference that he applied to gravity physicists who propagated BBGR. Feynman also warned gravity physicists saying: "Let me also say something that people who worry about mathematical proofs and inconsistencies seem not to know. There is no way of showing mathematically that a physical conclusion is wrong or inconsistent. All that can be shown is that the mathematical assumptions are wrong. If we find that certain mathematical assumptions lead to a logically inconsistent description of Nature, we change the assumptions, not nature."


Homogeneous means that the thing under consideration is the same everywhere. Things with some feature of their geometry being everywhere the same as in Euclidean geometry are called flat. E.g. a surface is "flat" if the ratio of area of a circle to its radius squared is the same everywhere on this surface and equal π. So by the above criterion the surface of the Earth isn't flat as some people ("flatearthers") think that it is. They think so because the "curvature" of the Earth is too small to be noticed. They can't notice it, that's why they think it's none. Similarly as with gravitational force that depends on tiny changes of speed of light outside of particle, but so small that people thought that there are none and so this force must be caused by "gravitational attraction" which as it was discovered by Einstein doesn't exist in the nature but only in what some humans think about this nature (hopefully no one who's read this article).


Hubble constant a.k.a. Hubble parameter, is the velocity of (apparent) expansion of the universe. It is equal to the ratio of (apparent) recessional velocity of galaxies to the distance to them. Hubble constant of Einstein's universe is equal Ho = c / RE where c is speed of light and RE is Einstein's Radius. The time derivative of difference of this velocity, dH/dt, and the velocity of uniform expansion is the (apparent) acceleration of (apparent) expansion of space. Einstein's theory of gravitation predicts its value as dH/dt = - Ho2 / 2. In 1998 it was observed as such by the Supernova Project team of astronomers.


Hubble law is the relation between distance to an astronomical object and its redshift, approximately exponential with distance. Quasars redshifts don't seem to fit this law and so their redshifts seem to be produced by a different mechanism than redshifts of galaxies (or the same mechanism if we allow the Einstein's version of general relativity, which then would be the general time dilation). However the Big Bang hypothesis can't tolerate a different mechanism of redshift than Doppler shift.


Hubble redshift is a phenomenon of light coming from distant galaxies with redshift increasing approximately exponentially with distance from the observer. The Big Bang hypothesis assumes that this redshift is Doppler shift due to the expansion of universe (Misner, Thorne, and Wheeler, 1973) plus 1998 correction for the exponential change of this redshift with distance observed only since 1998 by Supernova Project team and explained through the Big Bang hypothesis by the existence of "dark energy" of unspecified yet properties. Einstein's gravitation explains it by the rate of time slowing down in curved space proportionally to the curvature of space. It is required by the principle of conservation of energy since as it follows from this principle the sum of general time dilation and the curvature of space vanishes according to equation d2τ/dtdr + 1 / R = 0, where τ is proper time at point in deep space, t time coordinate (time of observer), r is radial coordinate (distance from observer to point in deep space), R is radius of curvature of space (Jastrzebski, 1985).


H-tensor (a.k.a. Hubble tensor, a.k.a. tensor of general time dilation, a.k.a. tensor of curvature of time) is a 3-dimensional tensor mirroring the properties of space curvature in the time domain and describing the physical properties of general time dilation in agreement with Feynman's opinion that "it would be kind of crazy to have something happening to space, without the time being involved in the same thing". The properties of H-tensor are defined by identity sqrt( R ) Hik( τi, t, rk) + Rik = 0ik where R is Ricci curvature scalar, i and k are [1, 2, 3], τi is proper time at observed place in deep space along coordinates, t is coordinate time (the proper time of observer), rk is distance from observer to observed point in deep space, Rik is Ricci curvature tensor.


Identity is an "equation" that is valid no matter what, while a "real" equation, that is not necessarily an "identity" is valid only for some particular case, a particular combination of variables in that equation. E.g. y = x2 is valid only for a particular sets of numbers, e.g. for (x,y) = (3,9) but not for (x,y) = (3,7). Finding what particular sets of numbers are valid for a given "equation" is called "solving the equation". One can't "solve" an "identity" since by definition it is "valid no matter what". So "identities" are just ways of stating that something is "the same as something else". E.g. the identity E = mc2 means that energy "E" and inertial mass "m" are the same things at certain coordinate speed of light "c". May be in different units, and then "c" takes role of a unit, but they are physically indistinguishable. There are no physical features that can be used to tell one from another.


Illusion of accelerating expansion of space is an illusion that the space of the universe is expanding and that this apparent expansion is acceerating. This is an artifact caused by the interpretation of the Hubble redshift as Doppler shift, allegedly caused by the recession of galaxies.


Illusion of gravitational attraction is an illusion that all particles of universe attract each other. This illusion is caused by the curvatures of spacetime that change the coordinate speed of light around each particle in such way that there shows up a gradient of particle's internal energy (dE/dx, where E is internal energy of the particle and x is displacement vector in the frame of this particle) that when the particle is immobilized it produces an inertial force equal -dE/dx. This force has been called gravitational force and it is a force pushing the particle in the same direction towards which it starts falling when it is in free fall (in direction g/g). Then it makes an illusion that this force is due to external "Newtonian attraction" as indicated by the known Newtonian equation (F = G M m r / r3 = mg), while it is an internal push from the inside of particle itself, due to the Einsteinian push, as the value of this push (F = -dE/dx = mg) indicates. Both forces are the same mg and that's why it was so difficult to discover the truth about gravitation and which part is accidental math (which turned out to be "Newtonian attraction") and which part is real physics (which turned out to be Einsteinian push, see Basics of Einstein's gravitation for derivations).


Interrelation of time and space is the effect of Einstein's relativity expressed by Feynman in his "Feynman Lectures on Physics" as "As you know from special theory of relativity, measurements of space and measurements of time are interrelated. And it would be kind of crazy to have something happening to space, without the time being involved in the same thing" [p. 42-7] and "It is impossible with space and time so intimately mixed to have something happen with time that isn't in some way reflected in space" [p. 42-14].


Intrinsic redshift was hypothetical redshift postulated the first time by Halton Arp or even by Fritz Zwicky (to my best knowledge) for a redshift existing in the universe as the reason for Hubble redshift. It was suggested as a separate redshift from all then known forms of redshifts. It turned out to be the same redshift that I used to call "general redshift", since 1985, not being aware of Arp's term. This redshift is described in this article as one that shows up in any physical space (curved space of positive curvature) and caused by general time dilation.


Isotropic is a property of being the same in any direction. The Copernican Principle states that the space of our universe is roughly homogeneous and therefore also "isotropic".


Joseph Medard Namyslowski is a physics professor and a particle physicists. He is accidentally involved in cosmology by the virtue of having a doctoral student W. Jim Jastrzebski who is doing his PhD work in the universe, also accidentally. Joe is trying to promote Jim's work among physics professors. So far with no luck.


Legend of "negligible" redshift in Einstein's universe. This autor learned from an astrophysicist Prof. Bohdan Paczynski (1940-2007) that such a legend existed when I tried to learn what would be the amount of redshift in stationary universe. Prof. Paczynski assumed that the Big Bang theorist would had calculated it if it were not negligible. Since it must have been negligible they just needed to show that it was negligible and he believed that such calculations existed somewhere in the literature since "obviously it couldn't be zero" as he said. He was surprised when I told him that it was assumed by MTW that it is zero due to the assumed symmetry of metric tensor of spacetime.


Magic is a mechanism through which a mathematical (phenomenological) model that uses non existing entities works. The same as the ordinary magic it works through accidental similarity of the model to the physical phenomenon. A good example is Newtonian gravitation with its gravitational forces that act at a distance. Newton didn't believe in such forces considering them mathematical entities that are only imagined and therefore a kind of magical things, as unicorns. Yet knowing their magical nature through the Newtonian equations that describe their behavior we may use these magical things in calculations and get almost true results due to the similarities between the equations that control their magical behavior to the real equations that control the behavior of the real gravitation (unknown in times of Newton). The magical things are useful as long as one does not consider them real and does not conclude about the real world as if those magical things were real. A newer example of magical thing is the expansion of universe that has been considered real by many 20th and 21st century gravity physicists despite that it requires dropping the principle of conservation of energy that most of them consider accepted and checked for years . Dropping a well tested principle for some, at best highly hypothetical, and at worst totally impossible, thing changes the phenomenological theory into a magical theory usually favored by theists though not by all of them since many of them believe that facts shouldn't be explained by magic.


Mathematical theory, a.k.a. "phenomenological theory" or sometimes, when it is applied outside its domain of application, a "magical theory". A theory that predicts everything that happens within its domain of application but doesn't explain why it happens this way. Examples: Newton's gravitation, the quantum mechanics, the Big Bang hypothesis. The "Copenhagen school" maintains (against common sense) that theories can be mathematical only and so the question "why?" is epistemologically empty. Some proponents of BBGR maintain that questions to which scientists don't know answers shouldn't be asked at all since they may be asked "on wrong assumptions", which I learned after asking prof. Baez, one of gravity physicists, about conservation of energy in gravitation and was told by him that "in Einstein's gravitation energy is not conserved as opposed to Newtonian physics where it is conserved", which prompted me to figure it out on my own how it is conserved in Einstein's gravitation and place it in section titled "Basics of Einstein's gravitation" for all curious people to learn how energy is conserved in Einstein's gravitation.


Metric tensor of spacetime is a tensor that describes distances along temporal and spatial coordinates in terms of their differentials. Symmetric metric tensor has only 4 independent elements and so it might be turned into diagonal form (when only non zero elements of the tensor are the diagonal terms of this tensor) while a non symmetric tensor can't be diagonalized since all 10 elements of the tensor are independent of each other (other 6 are always dependent on others). If gμν is metric tensor of spacetime then the square of distance in spacetime is equal to ds2 = g00dx0dx0 + g01dx0dx1 + ... + g33dx3dx3. In non symmetric spacetime (as in our universe) gμν is not the same as gνμ. The metric tensor of isotropic universe proposed by me (for one spatial dimension, since it is the same in all directions) is not only non symmetric but also degenerated but despite that the resulting metric is quite decent: ds2 = c2 exp(- r / RE)dt2 + 2sinh(r / RE)dtdr - exp(r / RE)dr2 which approximates to Minkowski ds2 = c2dt2 - dr2 for r << RE.


Misner, Thorne, and Wheeler, authors of a creationist version of general relativity, an over 1200 page book titled "Gravitation" (a.k.a. "The Bible") in which they push the hypothesis of creation of universe in a Hot Big Bang about 14 billion years ago. The hypothesis has been falsified by calculation of Hubble constant for Einstein's universe that came the same as Hubble constant observed in our universe strongly suggesting that our universe is Einstein's and therefore not expanding.


Paradise on Earth is a projected purpose of evolution and situation on the Earth when the Sun has already used its all available H and is powered by burning He but it makes no diff to species populating the Earth, since the life on the Earth is now 100% inorganic (see wiping out the organic life by H. sapiens in 20-something century and leaving it with industrial robots that evolved into intelligent species) and all Earth organisms are eternal since made of 100% replaceable parts so they don't need even to eat one another just enjoy life and art since they are even more then their ancestors sensitive to beauty.


Physical theory is a theory which its all predictions are true: really happen in the real world. Examples: corpuscular theory of gases, Einstein's special relativity, Einstein's gravitation, a.k.a. Einstein's general relativity (EGR) as opposed to the Big Bang general relativity (BBGR) which is a creationist hypothesis propagated between others by The Templeton Foundation with awards bigger than Nobel Prize to reconcile religion, that is based on axioms with science that is based on verifiable facts.


"Physicists don't understand gravitation" is a quote from my first semester ("Physics 1") physics teacher prof. Zharnecki who expressed the opinion of majority of physicists. I myself heard the opinion many times before. Most likely the opinion is caused by the poor way the physics of gravitation is taught. This poor way of teaching leaves over 99% of physicists without a slightest idea what is the reason for gravitational force which is the most common force in nature that every living thing feels whole its life. The physicists just know it is not "gravitational attraction" since they heard rumors that in Einstein's general relativity a.k.a. "Einstein's theory of gravitation" there is no such force acting through vacuum (also Newton was squarly against the existence of such force) yet teachers of physics assume that (screw Newton and Einstein) the best way of teaching physics is to imbue high school students, who later become physicists and astronomers, with the idea of "gravitational attraction being a real force of nature" (even one of "four fundamental forces" of nature). They know that later it is going to prevent physicists from understanding gravitation and not to protest (except those with critical minds which is only about 5% of any population) when the gravity physicists tell them that "the universe is expanding". And it may hold true even if they learn that the expansion of universe contradicts the principle of conservation of energy (remember, we are talking about ones without critical minds). This lack of opposition will allow creationists to maintain that it "might indicate" that there are more things in universe than the physicists know about and sneak into science some creationist garbage. The physicists just "won't understand gravitation" and so they won't suspect a large scale creationist fraud, as e.g. the Big Bang.


Pseudo Riemannian geometry differs from the four dimensional Riemannian geometry by signature which in Riemannian geometry is + + + + while in pseudo Riemannian geometries it is either + - - - (so called modern signature, with positive timelike intervals, used mostly in physics) or - + + + (so called traditional signature, with negative timelike intervals, used mostly in math).


Quantum features of Einstein's gravitation follow from the fact that an atom exchanges energy with another atom through exchange of a photon or a nucleus with another nucleus by the exchange of a meson. It means that whenever one object loses part of its gravitational energy (mc2) it happens in quanta. Calculations of probabilities of finding a particle somewhere in its direction of diminishing internal energy is more probable than it is at its old position or any other. So Einstein's theory turns out to be also a quantum theory that explains things with probabilities of certain events being more probable than others.


Quantum gravity is something the gravity physicists hope to release them from necessity to understand Einstein's gravitation. They hope that it will be a "real" theory of gravitation since they believe that the theory of gravitation should be a quantum theory and due to their way of understanding of physics of gravitation they don't realize that Einstein's theory is a quantum theory.


Quasars, a.k.a. quasi stellar sources of light are astronomical objects that look like stars (light points) but have redshifts much greater than the ones reasonably corresponding to their distance as calculated from their luminosity. Their existence indicates that they may be much closer to us than it would be indicated by the Hubble law and therefore their redshift may be due to something else than Doppler redshift assumed by the Big Bang hypothesis.


Real World is since about half of 17th century a subject of what physicists like Einstein investigate. It is thought by those physicists to exist objectively i.e. regardless of what H. sapiens thinks about it.


Redshift is an effect of wave coming to observer with longer wavelength (lower frequency) then wave emitted by sources close to observer. The reason for it may be either "Doppler shft" or the effect of time running at the source of the wave at different rate than at observer. The reason for the latter may be either "gravitational redshift" (difference of gravitational potentials between the source of light and observer) or "intrinsic redshift" (the effect of space curvature causing redshift regardless of the difference of gravitational potentials between the source of light and observer).


Repulsive gravitation is an attempt to save the Big Bang hypothesis through a magical force, apparently consistent with the Big Bang hypothesis, and making universe expanding faster and faster due to the alleged existence of "dark energy" in universe. There is no repulsive gravitation in Einstein's theory since gravitational force is neither repulsive nor attractive but an inertial force. See Basics of Einstein's gravitation.


Ricci tensor is a tensor which spatial part is describing the curvature of our common 3-D space.


Riemannian geometry is geometry proposed by Einstein as the geometry of spacetime when he still didn't understand fully the implications of application of this geometry to solutions of gravitational problems. In 1950 Einstein started to realize that to unify gravitation with electromagnetism (as it is done today) the spacetime can be only approximately described by symmetric metric tensor and he proposed that the metric must be non symmetric (Einstein, "On the Generalized Theory of Gravitation", Scientific American, April 1950). In reality it must be also a degenerate, which makes Riemannian geometry non applicable in gravitation since Riemannian metric is non degenerate.


σ (sigma) is standard deviation of the measured value. It is a measure of the accuracy of measurements. Physically it is the effective amplitude of the noise that is added to the measured variable by the measurements regardless of their number. It is also known as the rms (root mean square) value of the noise of measured value.


Somehow is a favorite way of explaining by creationists the ways that nature might be working when they introduce a contradiction with known physical principles to support their particular hypothesis. It is the way energy is created from nothing to support the Big Bang hypothesis.


Spacetime is space and time considered together as one four dimensional object. The spacetime has a property that the sum of general time dilation in any direction plus the curvature of space in this direction, vanishes which means that the spacetime is flat (proper volumes of spacetime are isotropic).


Structure of time dilation means how amount of time dilation changes along any particular direction. We know how much because it is relatively easy to figure out what mass causes what time dilation since we know the relation between gravitational field and gravitational time dilation (see Appendix 1 for the relevant equations) and the relation between gravitational field and mass that generates it we know from Newton's equation. Time dilation reflects exactly the Newtonian gravitational potential except that it does not contain its ambiguity about its absolute value since it has natural zero value at infinity.


Supernova Project was a project that was supposed to prove that the expansion of universe is decelerating to confirm the prediction of MTW that Einstein's cosmological constant should be set to zero to provide the first correct prediction of the BBGR. It would also confirm that discovery of cosmological constant by Einstein was a biggest blunder of his life. Unfortunately for MTW the prediction turned out to be wrong and the observation of expansion turned out to be corresponding to acceleration expansion as predicted by Einstein's universe model which proved that Einstein's cosmological constant was at least a valid discovery (called jokingly by Einstein "the biggest blunder of his life" for causing the cosmologists bothering Einstein about value of this newly discovered constant of nature preventing Einstein from doing any useful work, to the point that Einstein forbid his secretary to let in anyone wanting to talk to Einstein about the universe [Source: Roy Glauber, who worked at the time with Einstein as his assistant]. Yet the cosmologists took Einstein's joke as an admittance that cosmological constant should be deleted from Einstein's equation for the reason of elegance (Einstein then said: "If you are out to describe the truth, leave elegance to the tailor").


Support of theists for the BBGR has been documented by March 2008 Templeton Foundation's award of $1,600,000 to a cosmologist, mathematician, astronomer, and Catholic priest, Michael Heller from the Papal Academy of Krakow, Poland, "in recognition of scholarship and research that has pushed at the metaphysical boundaries of science".


Symmetry is esthetics of idiots. Discovery of counter position (a.k.a. "contraposto") in Greek sculpture (around 600 BC) in which pelvis is tilted in opposite direction to shoulders, as esthetically superior to symmetrical position of figure cultivated in previous sculptures, has been a breakthrough in art that has been continued in sculpture ever since.


Theism. Philosophy, or rather a belief, that the universe is controlled by supernatural beings (a.k.a. "ghosts", also "holy") or a supernatural being (a.k.a. "God") instead of evolution. The belief is supported by the belief, also of gravity physicists, most astronomers, and applied mathematicians (though neither "pure mathematicians" who consider BBGR being pseudoscience, nor the majority of physicists who, as they claim, don't understand gravitation) that energy (and therefore the matter being the same as energy as shown by Einstein's equation E = mc2) can be created, in "negligible amounts" though, from nothing, since otherwise the supernatural beings wouldn't have any possibility to intervene in the affairs of real world. The mathematical theory going with this belief is a belief that the metric of the spacetime is symmetric (despite that "symmetry is the esthetics of idiots" and Einstein, who believed rather in evolution than ghosts, has maintained that the metric of spacetime must be non symmetric. "Atheism" is opposite to "theism".


Time dilation means roughly that the time in any particular point in space runs slower than at a point far enough from any material objects. It means that presence of material objects slows down the rate of time in their vicinity.


Tired light effect is an apparent effect of photons reaching the observer with seemingly smaller frequency than they were emitted with behaving as if they lost part of their energy on the way. It turns out that photons don't do this and they just start from their sources with smaller energy since the time runs slower at their sources due to general time dilation.


University of Kansas, which introduced creationism as scientific discipline, declared that opposition to the Big Bang Cosmology is an atheist plot.


W. Jim Jastrzebski is a sculptor with MS degree in electronic engineering and the author of this article. He is accidentally involved in gravitation due to his 1985 calculation of general time dilation and his result that the expansion of space is an illusion caused by the inability of nature to make energy from nothing. Since it implies that Einstein's had it right, Jim is trying to vindicate Einstein's universe and spread this news as a tribute to Einstein. Cosmologists and astronomers ain't interested though.


Appendix 1:

Relation between time dilation and gravitational field

In any accelerating system (e.g. an accelerating rocket ship) the time in direction of acceleration a runs faster and slower in the opposite direction. The effect might be understood as photons radiated from places in the system in direction of acceleration gaining energy while they are passing distance dx towards the detector. The increase in energy is
  dE = (dx)a m (1.1)
where m is inertial mass of the photon. Substituting E / c2 for mass of the photon and dividing both sides by E we get relative change in energy of the photon, which is the same as the relative change of its frequency (because of Planck's relation E = hn) or in other words relative change of the time rate at the source of the photon since photon may be considered to be a clock ticking as fast as time runs at the place where it is coming from:
  dE/E = dν/ν = dt/t = (dx)a / c2 (1.2)
Expressed as a ratio of proper time τ to coordinate time t it looks like
  dτ/dt = 1 + (dx)a / c2 (1.3)
where x is the distance from the observer to the observed place in space.

This way we have a convenient way of translating time dilation expressed by dt/t in (1.2) into gravitational field g that works in opposite direction to acceleration (g = - a) and gravitational field into time dilation by the principle of equivalence. Whenever we have a certain amount of acceleration a causing certain amount of time dilation we must have also the same amount of time dilation causing acceleration. One translates into the other. Acceleration <=> time dilation (in opposite directions).

To get field in vicinity of mass M we may simply stand on the shoulders of a giant and apply Newton's equation since it is accurate enough for our purpose:
  g = GM r / r3 (1.4)
where G is Newtonian gravitational constant, G = 6.673x10-11m3/kgs2, and r is the displacement from the point under consideration to the center of gravity of mass M.


Appendix 2:

The Hubble constant of Einstein's Universe for planar light wave

In the simplest case of homogeneous space the relation between proper time in deep space and the coordinate time of the observer turns out to be dτ/dt = exp(-r / R), where τ is proper time in deep space, t is coordinate time at observer, r is distance from the observer to the observed place in deep space, and R a constant that turns out to be equal to "Einstein's radius" (RE) and so the "Hubble constant" of "Einstein's Universe" is Ho = c / RE where c is speed of light. A simple derivation of Hubble constant of Einstein's Universe, from first principles in a few lines of high school calculus, is presented for a planar light wave in this PDF document and delivers the same results as the derivation for a spherical light wave done above with a different method of derivation.


Appendix 3:

Average size of pieces of non luminous matter of universe

Assuming that the spectral distribution of energy radiated by a star may be presented, with an accuracy to the absorption lines of its atmosphere, by equation

I_o_(nu) = c_1 nu^3 / [exp(c_2 nu / T_s) - 1] (3.1)

where c1 and c2 are constants and Ts is the temperature of the star's surface (with the peak value at n = 2.82 Ts / c2), according to ν(r) = ν(0) exp(- r / R) and (3.1) the distribution at distance r from the source is

I(nu, r) = (c_1[nu exp(r/R)]^3)/(exp[c_2 nu exp(r/R) / Ts] - 1) (3.2)

therefore for any observer, the spectral distribution of radiation from all the stars is

I(nu)=c_3 Integ 0..oo ((p(r)[nu exp(r/R)]^3)/(exp[c_2 nu exp(r/R)/T_s]-1))dr (3.3)

where c3 is a constant and p(r) is probability of light passing distance r without hitting any obstacle on its way, which is

p(r) = exp(- r A / L^3) (3.4)
where A is the average area of an obstacle and L is the average distance between obstacles, assuming that rA << L3. Combining (3.3) and (3.4) and making substitution z = c2 n/Ts, x = z exp(r / R), and a = AR / L3 one gets the spectral density of the radiation from all luminous sources as

I(nu) = c_4 z^a Integer from 0 to infinity of 
(x^(2-a)/(exp(x) - 1)) dx (3.5)
where c4 is a constant. It is visible from (3.5) that this distribution is not a black body distribution, and therefore the background radiation is not just the redshifted starlight. Therefore the background radiation must be a radiation from the non-luminous matter of universe, matter that is in thermal equilibrium with the redshifted starlight. For a << 1 the peak value of this distribution represented by (3.5) is at z = 1.55 a1/2 and therefore the temperature of a black body having the peak value of its distribution of radiated energy at the same frequency is

T = 0.55 T_s A R / L^3 (3.6)

The average distance between the obstacles L may be determined from the relation r L3 = ro D3 where r is as before the Density of universe, ro is the density of the obstacle, and D is the diameter of the obstacle (assuming that the obstacles are roughly spherical objects for which approximately A = D2, and that almost the whole matter of universe is composed of such obstacles). R and r can be determined from H = c / R = sqrt(4 π G ρ). After all the substitutions the average diameter of the obstacle is

D = 0.04 c H T_s / (G T rho_o) (3.7)

Assuming value of Hubble constant H = 10-18 1/s, average temperature of stars Ts = 104 K, the temperature of thermal equilibrium of universe 2.7 K, and the density of the matter of obstacles ρo = 103 kg/m3 (H2O), the average diameter of the obstacle is of order of 2 m. It is large enough size to make the non luminous matter of universe responsible for the absorption of light in the millimeter wavelength range.


Literature
  • Einstein, A., "On the Generalized Theory of Gravitation", Scientific American, April 1950.
  • Misner, Thorne, and Wheeler, "Gravitation", 1973.
  • Jastrzebski, "The general time dilation: relativistic redshift in stationary clouds of dust", February 1985
  • Landau and Lifshitz, "Theory of Fields", p. 285

Linked articles
  • (Alleged) errors in Jim Jastrzebski's texts about Einstein's gravitation as perceived by referees and editors of scientific journals and identified by the visitors to this site.
    URL = http://geocities.com/jim_jastrzebski/sci/errors.htm
  • The general time dilation: relativistic redshift in stationary clouds of dust (PDF format) A paper explaining the Einsteinian reasons for greater than predicted by the Big Bang GR redshifts in stationary clouds of dust (quasars for small clouds, Hubble redshift for the whole universe).
    URL = http://geocities.com/jim_jastrzebski/sci/3266.pdf
  • Observational evidence for general time dilation and stationary universe. A paper presenting five pieces of observational evidence for stationary universe consistent with the radius of curvature of space equal 4.3 Gpc: density of space, illusion of accelerating expansion, "anomalous" acceleration of space probes, near quasars, average size of pieces of non luminous matter.
    URL = http://geocities.com/jim_jastrzebski/sci/3270.htm
  • Einsteinian gravitation for poets and science teachers. A description of Einstein's gravitation physics for lay people.
    URL = http://geocities.com/jim_jastrzebski/sci/einsteiniangravitation.htm
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