Planet
Earth
The only planet known to harbour life. 71% of its surface is covered by liquid water; its nitrogen–oxygen atmosphere and magnetic field shield the surface from the solar wind.
| Type | Planet |
|---|---|
| Parent body | Sun |
| Radius | 6,371 km · 1 R⊕ |
| Mass | 5.972 × 10²⁴ kg · 1 M⊕ |
| Mean density | 5.51 g/cm³ |
| Surface gravity | 9.82 m/s² · 1 × Earth |
| Escape velocity | 11.2 km/s |
| Rotation period | 23.9 hours |
| Mean distance from the Sun | 1 AU (150 million km) |
| Eccentricity | 0.017 |
| Orbital period | 365 days |
| Temperature | 288 K (15 °C) |
| Atmosphere | 78% N₂, 21% O₂ |
| Moons | 1 (the Moon) |
| Orbital speed | 29.78 km/s |
Moons and companions
- Moon Moon
- Europa Clipper Spacecraft
- ISS Spacecraft
- Hubble Spacecraft
- JWST Spacecraft