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Quick Facts
Earth/Mars Comparison
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Mars |
Earth |
| Average Distance from Sun |
142 million miles |
93 million miles |
| Average Speed in Orbiting Sun |
14.5 miles per second |
18.5 miles per second |
| Diameter |
4,220 miles |
7,926 miles |
| Tilt of Axis |
25 degrees |
23.5 degrees |
| Length of Year |
687 Earth Days |
365.25 Days |
| Length of Day |
24 hours 37 minutes |
23 hours 56 minutes |
| Gravity |
.375 that of Earth |
2.66 times that of Mars |
| Temperature |
Average -81 degrees F |
Average 57 degrees F |
| Atmosphere |
mostly carbon dioxide some water vapor |
nitrogen, oxygen, argon, others |
| # of Moons |
2 |
1 |
More Information on Mars:
Mars in the Solar System How does Mars measure up against the other planets?
Martian Moons: The diabolical duo: Phobos & Deimos.
Martian Seasons: What's the weather like?
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