Object | Moon | Earth |
---|---|---|
Type | Rocky satellite | Rocky planet |
Age | 4.53 billion years | 4.54 billion years |
Population | 0 | 7.7 billion |
Diameter | 3,474 km | 12,742 km |
Mean radius | 1,737 km | 6,371 km |
Mass | 7.34 × 1022 kg | 5.97 × 1024 kg |
Orbital period | 27 days | 365 days |
Surface temperature (average) |
220 K -53 °C -63 °F |
288 K 14.9 °C 58.7 °F |
Surface gravity | 1.6 m/s² | 9.8 m/s² |
Mean density | 3.3 g/cm3 | 5.5 g/cm3 |
Orbital distance | 384,402 km | 150 million km |
Circumference | 10,921 km | 40,075 km |
Surface area | 37 million km² | 510 million km² |
Volume | 2.19 × 1010 km3 | 1.08 × 1012 km3 |
Escape velocity | 2.3 km/s | 11.1 km/s |
Average orbital speed | 1.02 km/s | 29.78 km/s |
Semi major axis | 384 thousands km | 149 million km |
Inclination | 5.1° | 7.1° |
Surface pressure | 10−7 Pa | 101.3 kPa |
Atmosphere composition | argon, helium, neon |
78% nitrogen (N2), 21% oxygen (O2), ~ 1% water vapor, 0.9% argon, 0.04% carbon dioxide |
Crust composition | 45% silica, 19% alumina, 14% lime, 10% iron, 2% titanium dioxide, 0.6% sodium oxide |
60% silica, 16% alumina, 6% lime, 6% iron oxide, 4% magnesia, 3% sodium oxide, 2% potassium oxide |
Distance from the Milky Way center | 27,200 light years | 27,200 light years |