Science Pluto's largest moon may have once harbored subsurface ocean, say scientists

Researchers believe that Charon, the largest moon of Pluto, could have once had an interior warm enough to support an ocean of liquid water. 

By , SPACE.com Staff Writer

NASA, ESA and G. Bacon (STScI)

A NASA mission arriving in the Pluto system next year could help scientists figure out if the dwarf planet's largest moon Charon might have once harbored a subsurface ocean of liquid water.