Venus Statistics

Mean surface temperature .............................. 482°C
Atmospheric pressure (millibars)..................... 92000mb
Atmospheric composition
    Carbon dioxide ...................................... 96%
    Nitrogen ............................................ 3+%
    Trace amounts of: Sulfur dioxide, water vapor, carbon
    monoxide, argon, helium, neon, hydrogen chloride, and
    hydrogen fluoride.

Earth Statistics

Mean surface temperature ............................... 15°C
Atmospheric pressure (millibars) ....................... 1013mb
Atmospheric composition
    Nitrogen ............................................ 77%
    Oxygen .............................................. 21%
    Other ................................................ 2%

Mars Statistics

Atmospheric pressure (millibars) ....................     7mb
Atmospheric composition
    Carbon Dioxide (C02) ............................. 95.32%
    Nitrogen (N2)....................................... 2.7%
    Argon (Ar) ......................................... 1.6%
    Oxygen (O2) ....................................... 0.13%
	Carbon Monoxide (CO) .............................. 0.07%
    Water (H2O) ....................................... 0.03%
    Neon (Ne) ...................................... 0.00025%
	Krypton (Kr) ................................... 0.00003%
	Xenon (Xe) .................................... 0.000008%
	Ozone (O3) .................................... 0.000003%