What is the approximate water ice-to-rock ratio for Callisto's bulk composition?
Answer
About 50% rock and 50% water ice by mass
Callisto is the least differentiated, with its bulk composition suggesting it is approximately 50% rock and 50% water ice by mass, similar to its formation region.
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Ch. 13: Jupiter (24 of 37) Formation of the Jupiter's Galilean Moons
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