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 marked with craters. Craters are the little white marks in the picture. It looks like it might be the most heavily cratered body in the whole solar system. And some of the craters are very large
The number of craters means that in the history of Callisto, nothing has come along which caused the surface to change.
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