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Metric
Earth
Mars
Diameter (km)Physical size across the equator
12,742
6,779
Mass (Earths)Relative to Earth (= 1)
1
0.107
Gravity (m/s²)Surface gravitational pull
9.8
3.71
Avg Temp (°C)Average surface/cloud temperature
15°C
-65°C
MoonsKnown natural satellites
1
2