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How would you tell that a planet or a moon had no atmosphere just by looking at the surface?

In: Astronomy, Planetary Science, The Moon [Edit categories]

Answer:

If there are lots of craters, it means there is no significant atmosphere. The reason is that any craters will be eroded eventually, by the presence of an atmosphere.

First answer by Hilmarz. Last edit by Hilmarz. Contributor trust: 802 [recommend contributor ]. Question popularity: 1 [recommend question].

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