This is an image of Callisto in black and white.
Click on image for full size
Surface of Callisto
The surface of Callisto is deeply pockmarked with craters. It looks to be perhaps the most severely cratered body in the solar system. There are also very large
craters to be found there. The severity of the cratering indicates that the surface has not been changed
by activities from within Callisto, or "resurfaced
". This means that Callisto, alone perhaps among the Galilean satellites, has had no evolution
and is preserved, pristine, from the beginning of the solar system. This fact renders Callisto very interesting to scientists, because it represents the "starting point" that other icy bodies may have evolved from.
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