(for those who don't know, charon is plutos moon. Pluto and charon are allways face to face. They both dont orbit independently, they orbit a barycenter that is between them.)
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added the 2
Pluto, since it is scientifically more important being the 9th planet, although there is constant debating over being a dwarf planet/ Kuiper belt object. Then comes its moons. I mean moons as a plural because you forgot to list Nix and Hydra :p.