The IAU has approved the names Kerberos for Pluto's moon formerly known as P4, and Styx for Pluto's moon formerly known as P5. For detailed information about this naming, see the IAU press release. For more information about Kerberos and Styx and other moons and planets in our Solar System, see the Planet and Satellite Names and Discoverers page in the Gazetteer of Planetary Nomenclature.
The Working Group for Planetary System Nomenclature has approved new names for ten rupēs on Mercury: Alvin Rupes, Belgica Rupes, Calypso Rupes, Carnegie Rupes, Duyfken Rupes, Eltanin Rupes, Enterprise Rupes, Nautilus Rupes, Palmer Rupes, and Terror Rupes. For more information, see the Gazetteer of Planetary Nomenclature.
The IAU Working Group for Planetary System Nomenclature has approved some changes for Mercury nomenclature. Arecibo Vallis has been changed to Arecibo Catena, Goldstone Vallis has been changed to Goldstone Catena, Haystack Vallis has been changed to Haystack Catena, and Simeiz Vallis has been dropped. The theme for catenae on Mercury is "Radio telescope facilities," and the theme for valles is "Abandoned cities (or towns or settlements) of antiquity." For more information, see the feature categories in the Gazetteer of Planetary Nomenclature.