Farthest planet from the Sun


Planet Profile:

Equator Diameter:
49,528 km
Orbit Peroid:
60,190 days (164.8 years)
1.02 × 10^26 kg (17 Earths)
Effective Temp:
-214 °C
September 23rd 1846
Discovered by:
Urbain Le Verrier & Johann Galle

Quick Facts:

  • Neptune is the smallest of the ice giants, but has a greater mass than Uranus
  • Neptune appears blue because the methane absorbs the red light
  • Large storms whirl through its upper atmosphere, and high-speed winds track around the planet at up 600 meters per second
  • Neptune has a very thin collection of rings
  • Neptune spins on its axis very rapidly, despite its size, the clouds on its equator circle the planet every 18 hours.

- More Facts

- Further Reading




  • Triton
  • Nereid
  • Proteus
  • Despina
  • Larissa
  • Galatea
  • Thalassa
  • Naiad
  • + 6 others

Did you know?

Neptune has an incredibly thick atmosphere comprised of 74% hydrogen, 25% helium and approximately 1% methane. Its atmosphere also contains icy clouds and the fastest winds recorded in the solar system.

Return to: The Solar System