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For questions about the gases which surround a planet or some other celestial body.

80 votes

If there are water oceans, must there be oxygen in the atmosphere?

will the presence of large volumes of water inevitably result in some of the oxygen making its way into the atmosphere? … No The Earth has oxygen in its atmosphere because of cyanobacteria which produced most of earths oxygen through photosynthesis. However, your planet has "has no native life forms". …
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