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Contact: Maria Martinez
Southwest Research Institute

Jupiter and the Galilean Satellites

Caption: Jupiter (right) and the Galilean satellites (right to left) Io, Europa, Ganymede, and Callisto. Cutaways show the interior states of Ganymede and Callisto after many impacts by icy planetesimals during the late heavy bombardment. Colors represent density, with black showing the rocky core (with a density 3 g/cm^3), blue showing mixed ice and rock (densities 1.8 to 1.9 g/cm^3) and white showing rock-free ice.

Credit: Southwest Research Institute

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Related news release: SwRI researchers offer explanation for the differences between Ganymede and Callisto

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