And the new research may offer evidence for a subsurface ocean beneath Pluto’s icy crust. Charon and Earth’s moon are both a large fraction of the size of the main body they orbit, which is ...
In fact, Charon and Pluto are so similar in size that they are considered a double dwarf planet system, not a planet and moon. Charon is smaller than Earth's moon. In fact, Pluto is smaller than ...