Neptune, which is usually the eighth planet from the Sun, is a very cold place. Occasionally, the ninth planet Pluto crosses Neptune's orbit and becomes the eigth planet . Its bluish color comes from its atmosphere of methane gas. The planet has eight moons and a very narrow, faint ring system. Interior & Surface Atmosphere Magnetosphere Moons & Rings Planetary Facts Myth & Culture Space ...

NSSDC Photo Gallery: A collection of popular and frequently requested imagery from NASA's data archive ...

Neptune The Mystic Neptune is the eighth planet from the Sun and the fourth largest (by diameter). Neptune is smaller in diameter but larger in mass than Uranus. orbit: 4, 504, 000, 000 km (30.06 AU) from Sun diameter: 49, 532 km (equatorial) mass: 1.0247e26 kg In Roman mythology Neptune (Greek: Poseidon) was the god of the Sea. After the discovery of Uranus, it was noticed that its orbit was not as ...

Neptune is the outermost planet of the gas giants. It has an equatorial diameter of 49500 km. If Neptune were hollow, it could contain nearly 60 Earths. Neptune orbits the Sun every 165 years.

Mathematical discovery of planets Mathematical Astronomy index History Topics Index The first planet to be discovered was Uranus by William and Caroline Herschel on 13 March 1781. It was discovered by the fact that it showed a disk when viewed through even a fairly low powered telescope. The only other planets which have been discovered are Neptune and Pluto. These were predicted using ingenious ...

Neptune, from ORRERY: the Solar System in action.