Average distance from the Sun: 2,796,460,000 mi.
Diameter of the planet: 30,775 mi.

To the Greeks, Neptune was known as Poseidon, the God of the sea.
To the Romans, he was Neptune the Mystic.
Neptune is a very large, very cold planet.
It weighs about 226 trillion trillion pounds.
The gravity on Neptune is 1.09 times that of Earth's, so if you were to take a trip to Neptune, you would be ten percent heavier.
During its orbit, Neptune's distance from the sun varies from 2,771 to 2,819 million miles.
Neptune orbits the sun at 12,147 miles per hour.
One Neptune year is 164.79 Earth years.
One Neptune day is 16.1 Earth hours long.
In 2011, Neptune will have orbited the sun once since it was discovered.
Neptune has eight moons. They are called Triton, Nereid, Despina, Galatea, Larissa, Naiad, Proteus, and Thalassa.
Neptune has four rings, and are named by the year they were found, the planet they surround, what they are, and which ring they are: 1989N1R, 1989N2R, 1989N3R, and 1989N4R.
Neptune's atmosphere is 85% hydrogen, 13% helium, and 2% methane.