Astrogeology Science Center

Names, Theme, and Boundary Change Approved for Mercury

15 March 2017 The IAU Working Group for Planetary System Nomenclature has approved an expanded boundary for Borealis Planitia, and the following new names for use on Mercury: Turms Planitia, Otaared Planitia, Apārangi Planitia, Sihtu Planitia, Papsukkal Planitia, Catuilla Planum, Stilbon Planitia, Mearcair Planitia, Lugus Planitia, and Utaridi Planitia. The theme "names for Mercury (either the planet or the god) in various languages" was approved for planum/plana. For more information, see the Gazetteer of Planetary Nomenclature.