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How can worlds like triton and pluto have atmospheres when a larger world such as ganymede has none?
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45 votes
45 votes
How can worlds like triton and pluto have atmospheres when a larger world such as ganymede has none?

User Jesbus
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1 Answer

16 votes
16 votes
They are farther from the sun, hence colder, hence they can hold onto gases, warmer environments can't.
User Mike Duigou
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