Planet
Uranus
An ice giant tilted 98°, so it practically "rolls" along its orbital plane. Methane in its atmosphere gives it its pale cyan colour.
| Type | Planet |
|---|---|
| Parent body | Sun |
| Radius | 25,362 km · 3.98 R⊕ |
| Mass | 8.681 × 10²⁵ kg · 14.5 M⊕ |
| Mean density | 1.27 g/cm³ |
| Surface gravity | 9.01 m/s² · 0.92 × Earth |
| Escape velocity | 21.4 km/s |
| Rotation period | 17.2 hours (retrograde) |
| Mean distance from the Sun | 19.2 AU (2,871 million km) |
| Eccentricity | 0.047 |
| Orbital period | 84.1 years |
| Temperature | 76 K (-197 °C) |
| Composition | H₂, He, CH₄ (2.3%) |
| Moons | 28 |
| Discovery | 1781, W. Herschel |