Astrogeology Science Center

Themes Approved for the Pluto System

27 February 2017 The IAU Working Group for Planetary System Nomenclature has approved revised themes for Pluto and Charon. Themes for the four smaller moons, Styx, Nix, Kerberos, and Hydra remain unchanged. For more information, see the Categories page in the Gazetteer of Planetary Nomenclature or the IAU press release.