Possible 'Moonwich' of Ice and Oceans on Ganymede (Artist's Concept)
This artist's concept of Jupiter's moon Ganymede, the largest moon in the solar system, illustrates the 'club sandwich' model of its interior oceans. Scientists suspect Ganymede has a massive ocean under an icy crust.
This is a frame from an animation of a rotating globe of Jupiter's moon Ganymede, with a geologic map superimposed over a global color mosaic, incorporating the best available imagery from NASA's Voyager 1 and 2 spacecraft, and Galileo spacecraft.
Ganymede Global Geologic Map and Global Image Mosaic
To present the best information in a single view of Jupiter's moon Ganymede, a global image mosaic was assembled, incorporating the best available imagery from NASA's Voyager 1 and 2 spacecraft and NASA's Galileo spacecraft.
This picture was taken on March 4, 1979 at 2:30 A.M. PST by NASA's Voyager 1 from a distance of 2.6 million kilometers (1.6 million miles). Ganymede is Jupiter's largest satellite with a radius of about 2600 kilometers, about 1.5 times that of our Moon.
Natural color view of Ganymede from NASA's Galileo spacecraft during its first encounter with the satellite. The dark areas are the older, more heavily cratered regions and the light areas are younger, tectonically deformed regions.