This is our best guess scenario of what the interiors of the four Galilean moons of Jupiter look like. Callisto Diameter 4821 km (2,995 miles) Mass (1.075938±0.000137)×1023 kg (0.018 Earths) Mean Density 1.8344±0.0034 g/cm3 |
Pluto Diameter is 2374±8 km (1473 miles) Mass is (1.303±0.003)×1022 kg, 17.7% of the Moon Mean density is 1.860±0.013 g/cm3 |