Mars and Moon
Mars (planet) and Moon (Earth’s natural satellite) side by side – to scale and in numbers.
| Mars | Moon | Mars ÷ Moon | |
|---|---|---|---|
| Diameter | 6,792 km | 3,475 km | 1.95 × |
| Mass | 6.42 × 10²³ kg | 7.30 × 10²² kg | 8.79 × |
| Surface gravity | 3.70 m/s² | 1.60 m/s² | 2.31 × |
| Density | 3,934 kg/m³ | 3,340 kg/m³ | 1.18 × |
| Mean temperature | -65 °C | -20 °C | |
| Mean distance from the Sun | 228.0 million km | 149.6 million km with Earth |
1.52 × |
| Length of day | 24.7 h | 29.5 days sunrise to sunrise |
0.03 × |
| Year (orbit around the Sun) | 1.88 years | 365.2 days (1.00 years) with Earth |
1.88 × |
| Orbit around its planet | – | 27.3 days around Earth |
|
| Known moons | 2 | – |
Data: NASA Planetary Fact Sheet, JPL SSD (planetary moons), JPL SBDB (dwarf planets) – public domain. Moon gravity is calculated from the JPL mass (GM) and radius; a moon’s “year” is its planet’s orbit around the Sun. A dash – no value in these sources.
⇄ Swap sides More about Mars More about Moon