Contact: Maria Martinez
Southwest Research Institute
Caption: Interior density structures created by an outer solar system late heavy bombardment onto Ganymede (top row) and Callisto (bottom row). The left column shows the density at the surface as a function of latitude and longitude, and the right column shows a slice through the center of the globe. Colors show the density, with black representing pure rock, blue representing mixed ice and rock, and white showing pure ice.
Credit: Southwest Research Institute
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Related news release: SwRI researchers offer explanation for the differences between Ganymede and Callisto