Planet
Neptune
TypePlanet
Mass1.024 × 10²⁶ kg
Diameter49,244 km
Orbital Radius4,495 million km
Orbital Period60,190 days
Rotation Period16.11 hours
Known Moons16
Surface Gravity11.15 m/s²
Average Temp-200 °C
AtmosphereH2 (80%), He (19%), CH4 (1%)
Discovered ByJohann Galle
Discovery Year1846
About Neptune
The most distant planet, an ice giant with the strongest winds in the solar system (up to 2,100 km/h). Its deep blue color comes from methane. Has a storm system called the Great Dark Spot (now vanished). Its moon Triton orbits backwards, suggesting it was captured from the Kuiper Belt. Found through mathematical prediction.
Moons
Neptune has 16 known moons in total.
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