Earth's Moon
- Diameter: 3,474 km (2,159 miles)
- Orbit:
- Average Distance from Earth: 384,400 km (238,855 miles)
- Orbital Period: 27.3 days (sidereal month)
- Synchronous Rotation: Always shows the same face to Earth.
- Composition:
- Surface: Mainly silicate rock with a crust, mantle, and core.
- Surface Features: Maria (large plains), highlands, craters, and basins.
- Atmosphere: Extremely thin exosphere, composed of helium, neon, and hydrogen.
- Influence: Affects Earth's tides due to its gravitational pull.