Earth
Terrestrial Planet
Earth is the only known world with liquid water oceans on its surface, a breathable oxygen-nitrogen atmosphere, and life. Its magnetic field, generated by a molten iron core, shields the surface from most solar and cosmic radiation.
Field Notes
- Earth is the only planet not named after a Greek or Roman deity.
- Its molten iron core generates a magnetic field that deflects most harmful solar radiation.
- About 71% of the surface is covered in liquid water, giving Earth its blue appearance from space.
| Planet Specifications | |
|---|---|
| Radius | 6,371 km |
| Mass | 5.972 × 10²⁴ kg |
| Distance from Sun | 149.6M km |
| Rotation Speed | 1,674 km/h |