Neptune
- Diameter is 30,200 miles (48,600 km)
- Distance is 2,788,000,000 miles (4,504 million km) from the sun
- Average temperature is -357°F (-216°C)
- Neptune has eight moons.
- Two named satelllites.
- Triton is closest to the planet.
- It is larger than earth's moon.
- It may have an atmosphere.
- Orbits Neptune in the opposite direction of Neptune's rotation.
- Nereid revolves in the same direction as the planet.
- Rotation takes 16 hours, 3 minutes.
- Revolution takes 164.8 years (164 years, 288.54 days).
- Density is estimated to be about 1.7 times that of water.
- Visble only through a telescope, it appears as a small greenish disc in the night sky.
- Together with Uranus, referred to as the "Twin Planets."
- An enormous storm system moving around its surface gives Neptune a "Great Dark Spot" similar to Jupiter's "Great Red Spot."
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