Ice Giant#8 from the Sun
Neptune
The Windiest World
Neptune is the farthest planet from the Sun and the windiest in the solar system, with jet streams reaching 2,100 km/h — faster than the speed of sound. It was the first planet found by mathematical prediction rather than observation. Neptune's deep blue color comes from methane in its atmosphere. Its largest moon, Triton, orbits backward and is likely a captured Kuiper Belt object.
⚖
Mass
1.02 × 10²⁶
kg
◎
Diameter
49,244
km
↓
Gravity
11.15
m/s²
🌡
Temperature
-200
°C cloud top
☀
Day Length
16.1
hours
⟳
Year Length
164.8
Earth years
↔
Distance from Sun
4,495
M km
Atmosphere
80% H₂, 19% He, 1.5% CH₄ — supersonic winds
Moons(1)
Triton
Diameter: 2,707 kmDiscovered: 1846 — Lassell
Orbits Neptune backward — the only large moon to do so. Likely a captured Kuiper Belt dwarf planet. Has nitrogen ice geysers and a thin atmosphere.