Moon
Earth's satellite
Earth's only natural satellite and the only world humans have visited. Tidal locking keeps the same side facing us at all times.
Data
- Type
- Earth's satellite
- Equatorial radius
- 1,737.4 km
- Orbital period
- 27.3 days
- Rotation period
- 27.3 days
- Distance
- 384,400 km
Observing tip
The most dramatic detail lies along the terminator, the line between light and shadow, where crater shadows are longest. At full Moon the relief looks flat.