Neptune-Neptune is the eighth planet from the Sun and the fourth of the outer planets. Like Uranus, Neptune is a blue color because its atmosphere is mainly made of methane gas. Jupiter has the "Great Red Spot" that looks like an eye. Neptune has a "Great Dark Spot". Jupiter's spot is really a storm. Scientists think that Neptune's spot is a hole in its atmosphere.
Neptune has 8 moons. The biggest one is Triton.

Neptune

Fast Facts:

  • Namesake: Roman God of the Sea
  • Neptune was discovered in 1846
  • Neptune has four rings
  • Neptune's atmosphere is made up of: Hydrogen (79%), Helium (18%), & Methane (3%)
  • It is very windy on Neptune (the winds are 9 times stronger than Earth's winds)
  • It takes about 165 Earth years for Neptune to orbit the Sun.
  • One rotation (day) on Neptune is just over 16 hours.

Enchanted Learning's Fact Sheet on Neptune