Atmosphere of Mars - Wikipedia
The atmosphere of Mars is the layer of gases surrounding Mars.It is primarily composed of carbon dioxide (95%), molecular nitrogen (2.8%) and argon (2%). It also contains trace levels of water vapor, oxygen, carbon monoxide, hydrogen and noble gases. The atmosphere of Mars is much thinner than Earth's.The average surface pressure is only about 610 pascals (0.088 psi) which is less than 1% of ...
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