Mars Facts

 
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Link: very detailed list of planetary facts

 

                   

Comparison Mars Earth

  Mars Earth Ratio
Mars : Earth
equatorial radius in km 3393,4 6378,1 0,532 : 1
gravitation in m/s2 3,719 9,81 0,379 : 1
mass in 1024kg 0,64185 5,974 0,107 : 1
duration of a sideral day in h 24,6229 23,9345 1,029 : 1
duration of a year
in sideral Earth days
686,980 365,256 1,88 : 1

 

Comparison of the atmospheres (composition in volume percent)

  Mars Earth Ratio
Mars : Earth
surface pressure: 6,7 mbar 1013 mbar 0,0066 : 1
Carbon dioxide CO2 95,32 % 0,035 % 2723 : 1
Nitrogen N2 2,7 % 78 % 0,035 : 1
Argon Ar 1,6 % 0,93 % 1,72 : 1
Oxygen O2 0,13 % 20,95 % 0,0062 : 1
Carbon monoxide CO 0,07 % 0,1 ppm 7000 : 1
Water H2O 0,03 % 0 bis 4 %  

 

Overview of the Martian moons

  Deimos Phobos
dimensions in km 15x12x11 27x21x19
semi major axis in km 23490 9350
Deimos is one of the smallest known moons in our solar system. It's orbiting in the third smallest radius. Phobos is also a quite tiny moon having the smallest major axis (of all moons) in the solar system. Due to gravitational effects between Mars and Phobos, it is continuously braked and loosing  altitude by 1.8 meters per century. Both moons are characterised by a low albedo, this means that a small amount of the sun exposure is reflected, thus the body is very dark. The structure of the moons gives hints, that they are captured asteroids.

 

 


 
 
Author: Dennis Reiß WWW-Editor: Dennis Reiß 
Last Modified: Wednesday, 07-Jul-2004 15:22:16 CEST