Categorized | Neptune, Solar System Facts

Interesting Facts About Neptune

  • Neptune is the fourth largest planet in the Solar System.
  • Neptune is a gaseous planet and is composed of hydrogen, helium, methane, with traces of ammonia and water.
  • Neptune was discovered by Urbain Le Verrier, John Couch Adams, and Johann Galle on September 23, 1846.
  • The only spacecraft which ever visited Neptune was Voyager 2 in 1989.
  • Neptune has the strongest winds in the Solar System. Winds on Neptune can reach up to 2,000 km/hour (1,200 miles/hour).
  • The blue color of the planet is owed to the absorption of red light by methane in the atmosphere.
  • The orbital speed of Neptune is 5.4 km/second.
  • The diameter of Neptune is 49,493 km
  • One Neptune day is equal to 0.75 Earth Days
  • One Neptune year is equal to 164.83 Earth Years
  • Neptune’s maximum distance from the Sun is 4.5 billion km (2.8 billion miles)
  • Neptune’s minimum distance from Earth is 4.3 billion km (2.7 billion miles)
  • Neptune has 13 moons, the largest of which is named Triton. The other moons are: Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Nereid, Halimede, Sao, Laomedeia, Neso, and Psamathe.


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