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Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System.

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Impact crater

Impact Craters as Windows to What Lies Beneath

Impact craters are common on all solar system bodies. They offer many clues to scientists regarding the geologic history of a planetary surface, particularly regarding its age, evolution with time, and composition.

The Writing is on the Wall

Even after the ice disappears, the glacial moraines remain, marking the furthest extent (or end) of the glacier.
Terby Crater

Bedrock North of Terby Crater

This image samples the excellent bedrock exposures north of Terby Crater, which lies on the northern rim of the giant Hellas basin.