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Mars Global Fact Sheet

The following data is presented in a form to compare the characteristics of Mars with the Earth and our Moon.

Earth, Mars and the Moon Compared Globally
CategoryEarthMarsMoon
Size (equatorial radius in kilometers)637833971738
Surface Area (square kilometers)5.1 x 1081.4 x 1083.79 x 107
Mass (kilograms)5.974 x 10246.4 x 10237.35 x 1022
Density (grams/centimeter35.5153.943.36
Surface Gravity (meters/second29.873.721.62
Mean Escape Velocity (kilometers/second)115.12.38



Mars and Earth Compared Orbitally
CategoryMarsEarth
Eccentricity0.09340.0167
Inclination (degrees)1.85040.00
Mean orbital velocity (kilometers per second)24.1329.79
Mean orbital period (length of sidereal year)686.98 Earth days
669.60 Mars days		365.25 Earth days
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