Charon is Pluto's only round moon. It is so big that it is sometimes considered a double planet, along with Pluto itself. It was discovered in 1978, visited by the New Horizons spacecraft. Later, it was colonized. Retrieved from "https://space-engine.fandom.com/wiki/Charon?oldid=43197" Categories: Moons Unfinished Milky Way Vastly Unfinished Community content is available under CC-BY-SA unless otherwise noted.