Neptune
NASA/JPL
Ice giant

Neptune

Has the fastest winds measured in the Solar System.

Object typeIce giant
Diameter49,244 km
Mass17.1 Earth masses
Gravity11.15 m/s²
Average temperatureAbout -200°C
Distance from the Sun4.5 billion km
Orbital period165 Earth years
Rotation period16.1 hours
Number of moons14
AtmosphereHydrogen, helium, methane
DiscoveryPredicted mathematically and observed in 1846

Interesting Facts

  • Has the fastest winds measured in the Solar System.
  • Triton likely began as a captured Kuiper Belt object.

Major Missions

  • Voyager 2