The Gazetteer of Planetary Nomenclature web site will be unavailable from 5:00 pm MST Friday, May 24 until approximately 7:00 am MST Tuesday, May 28. This outage is required for hardware installation and maintenance.
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.
The 1:1 million-scale maps of the Moon in the Gazetteer of Planetary Nomenclature now show the Lunar Reconnaissance Orbiter Camera (LROC) Wide Angle Camera (WAC) global morphologic map as the base. Previous versions of the maps used the USGS shaded relief and color-coded topography and the USGS Lunar Orbiter mosaics as the base. The previous versions are no longer supported; URLs that linked to these versions have been redirected to the current maps with the LROC WAC image base. For more information, see the page that describes these maps in the Gazetteer of Planetary Nomenclature.