"Something big hits Pluto, and you get Charon, but like with the Earth-moon system, we don't fully know how that works and the conditions under which that occurs," Denton said. "It's a pretty big ...
Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a subsurface ocean on the icy dwarf planet.
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. For decades ...