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Planetary Atmospheres

 

Primary Atmospheric Components for the Planets

 

  Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto
Carbon Dioxide   96%   95.32%          
Nitrogen   3+% 78% 2.7%         Tenuous
Oxygen 15%   21% 0.13%          
Argon 42%   1% 1.6%          
Water Vapor  

0.1%

  0.03%          
Hydrogen Trace       90% 97% 83% 85%  
Helium Trace       10% 3% 15% 13%  
Methane             2% 2% Tenuous
Neon       0.00025%          
Sodium 42%                

 

 

Exploring The Planets
©2002 National Air and Space Museum