North is to the top of the picture and the sun illuminates the surface from the right.
The dark areas are the older, more heavily cratered regions and the light areas are younger, tectonically deformed regions. The brownish-gray color is due to mixtures of rocky materials and ice. Bright spots are geologically recent impact craters and their ejecta. The finest details are about 13.4 kilometers across. Galileo Orbiter Back to index.