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Atmosphere of Mars
? TBD
Layer of gases surrounding the planet Mars
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Wikipedia

The atmosphere of Mars is the layer of gases surrounding Mars. It is primarily composed of carbon dioxide (95%), molecular nitrogen (2.85%), 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 and colder than Earth's having a max density 20g/m3 ...

Part of
Mars
References
Wikidata