|
Water-ice,
salt and snow discovered on Mars
by NASA's Phoenix
Lander.
|
|
Past
Missions:
|
|
Mars
as seen from
Hubble
Credit: NASA ESA |
|
| Atmosphere: |
95%
(CO2)
carbon
dioxide, 3%
nitrogen, 1.6% argon, very thin only 1% of
Earth. |
|
|
| Mass: |
6.42*10^23kg
11%
of
Earth |
| Equatorial
diam: |
6794km
or 4222mi 53% of Earth |
| Surface
gravity: |
3.7m/s
38%
of Earth |
| Escape
velocity: |
5.0km/s
or 3.1mi/s 45% of Earth |
| Surface temp: |
-220F-70F
|
| Satellites
(natural): |
2
Phobos and Deimos |
|
|
