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