Pluto possesses five known moons. Charon is by far the largest, being fully half the size of Pluto. Pluto’s other four moons—Hydra, Nix, Kerberos, and Styx—are much smaller than Charon. All four are elongated and revolve around Pluto outside Charon’s path in nearly circular orbits and in the same orbital plane as Charon.
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