Artist's rendition of Rhea flyby 'R-3'

March 9, 2013

This gravity flyby of Rhea is designed to understand the internal structure of Rhea. Is Rhea a homogeneous body or did it differentiate into a core, mantle, and crust like the Earth? The radio science subsystem will use radio waves beamed to Earth to perform precise measurements designed to answer this question.

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Credit: NASA/JPL-Caltech