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Dark Skies
Star Parties
Solar System
Light Pollution
Did you know you can use an inexpensive web cam to capture images of planets and other objects in the night sky?
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How big are the planets
in our solar system?

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<a href='/solarsystem/sun/index.html'>sun</a> Sun
mercury Mercury
venus Venus
earth Earth
mars Mars
jupiter Jupiter
saturn Saturn
uranus Uranus
neptune Neptune
pluto Pluto
Planet Stats
Planet Sizes
Planets & Stars
A Light Year
Neptune is the eighth planet form the sun.

Neptune Facts

  1. Neptune is the fourth largest planet in the Solar System.
  2. Now that pluto has been demoted, Neptune is considered the furthest planet from the sun.
  3. Neptune was discovered in 1846 by Johann Galle.
  4. The only spacecraft ever to visit Neptune was the Voyager 2 in 1989.
  5. Neptune is a gas planet, composed of hydrogen, helium, methane, with traces of ammonia and water.
  6. The blue color of the planet is due to the absorption of red light by methane in the atmosphere.
  7. Neptune has stronger winds than any other planet in the Solar System. Blowing in a westerly direction, winds on Neptune get up to 2,000 km/hour (1,200 miles/hour). "The Scooter" is a cloud that moves around Neptune about every 16 hours.
  8. Neptune is named after the god of the sea in Roman Mythology.
  9. Neptune's named moons are Naiad, Thalassa, Despina, Nereid, Galatea, Larissa, Proteus, Triton, and Psamathe
  10. The largest moon of Neptune is Triton. In Greek mythology, Triton was a sea god and the son of Neptune.
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