Earth/Mars Comparison
|
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?
Mars Atlas:
Find your way around the Red Planet.