A glossary will be what a glossary
is. Now to clear the haze. Please remember that the terms are used due
to their relative and appropriate meanings in each section in this website.
Here are then the TRUE meanings of these words.

Note : You might want to open this
in a new window and use it for reference.

*Cosmological constant* : Mathematical
term involving a repulsive force, which Einstein introduced into his
field equations in the general theory of relativity to counteract the
self gravitation of the Universe.

*Event horizon* : The region,
usually described as spherical, marking the outer boundary of a black
hole, inside which the gravitational force is strong enough to prevent
matter or radiation from escaping.

*Hubble's constant* : A ratio
expressing the rate of apparent expansion of the universe, equal to
the velocity at which a typical galaxy is receding from Earth divided
by its distance from Earth.

*Quark* : Any of a group of six
elementary particles having electric charges of a magnitude one-third
or two-thirds that of the electron, regarded as constituents of all
hadrons.

*Singularity* : A point in space-time
at which gravitational forces cause matter to have infinite density
and infinitesimal volume, and space and time to become infinitely distorted.

*Wormhole* : A theoretical distortion
of space-time in a region of the universe that would link one location
or time with another, through a path that is shorter in distance or
duration than would otherwise be expected.