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Nature 410, 25-27 (1 March 2001) | doi:10.1038/35065183

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Planetary science: Icing Ganymede

Louise M. Prockter

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Much of Jupiter's moon Ganymede is covered in comparatively young ice. Images from spacecraft are providing clues about whether this resurfacing occurred primarily through tectonic or volcanic events.

Jupiter has 16 known satellites, one of which, Ganymede, is a whopper — it is the largest moon in the Solar System, and is bigger than Mercury. Its surface is divided into two very different types of terrain.