Cassini finds oxygen-carbon dioxide atmosphere on Saturn's moon Rhea

Friday, November 26, 2010 - 07:00 in Astronomy & Space

(PhysOrg.com) -- In a flyby past Rhea, Saturn's second-largest moon, NASA's spacecraft Cassini has revealed the presence of a thin atmosphere of 70 percent oxygen and 30 percent carbon dioxide, which is apparently sustained by chemical decomposition of the moon’s ice-covered surface.

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