Plate IV
Earth
The only known world with stable liquid water on its surface, and an atmosphere rich in free oxygen sustained by life itself. Its moon, unusually large relative to the planet, stabilises the tilt of its axis — and with it, the seasons.
| Diameter | 12,742 km |
| Average distance from Sun | 149.6 million km (1 AU) |
| Local year | 365.25 days |
| Moons | 1 |