Mars and Earth compared 
Mars and Earth compared
| Property |
|
|
| Equatorial diameter | 6 790 km | 12 760 km |
| Polar diameter | 6 750 km | 12 710 km |
| Duration of 1 rotation | 24.62 hours | 23.94 hours |
| Mass (Earth=1) | 0.107 | - |
| Average density (water=1) | 3.94 | 5.52 |
| Acceleration due to gravity (at surface) | 3.7 m/s2 | 9.81 m/s2 |
| Escape velocity | 5.0 km/s | 11.2 km/s |
| Inclination of axis | 24.0o | 23.4o |
| Maximum temperature | +27oC | +58oC |
| Minimum temperature | -126oC | -88oC |
| Composition of atmosphere | ~99% CO2, 1% Ar, Kr, O2, H2O, N2 etc | ~79% N2, 21% O2, some CO2, H2O, Ar |
| Density of atmosphere | ~7-8 mbar | ~1013 mbar (sea level) |
| Natural Satellites | 2 | 1 |