User:Milton Beychok/Sandbox2
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| Physical Characteristics | |
|---|---|
| Mean circumference | 10,917.0 km |
| Mean radius | 1,737.5 km |
| Mass | 7.3477×1022 kg |
| Volume | 2.197×1010 km3 |
| Density | 3.344 g/cm3 |
| Surface area | 3.79367×107 km2 |
| Surface gravity | 1.624 m/s2 |
| Escape velocity | 2,376 m/s |
| Surface temperature (night/day) | -233/123 °C |
| Rotational and Orbital Characteristics | |
| Distance from Earth: Average Apogee (farthest) Perigee (closest) |
384,400 km 405,696 km 363,104 km |
| Rotation velocity around own axis | 4.6246 m/s |
| Rotation period around own axis (length of "Moon day") (a) |
655.73 hours 27.322 Earth days |
| Orbit distance around the Earth | 2.4134×106 km |
| Orbit velocity around the Earth | 1.0224 km/s |
| Orbit period around the Earth (length of "Moon year") (a) |
655.73 hours 27.322 Earth days |
| Orbit period around the Sun | 365 Earth days 13.359 Moon days |
| (a) Defining a celestial body's year as the time it takes the celestial body to travel one orbit around a larger celestial body. Thus, the orbit period of the Moon around the Earth is a "Moon year". It is simply happenstance that the Moon also takes 27.322 Earth days to rotate around its own axis and so a "Moon day" equals a "Moon year". | |