Mars, named after Wales

3 named features. The International Astronomical Union records why each name was chosen, and those reasons are printed below exactly as they were approved.

FEATURES · 3

NAME	TYPE	SIZE	WHY THAT NAME
Mawrth Vallis	valley	634.6 km	Welsh word for "Mars".
Sarn	crater	11.4 km	Town in Wales.
Porth	crater	9.5 km	Town in Wales.

Names and their origins come from the IAU Gazetteer of Planetary Nomenclature (USGS Astrogeology), retrieved 2026-08-14.
All named features ｜ KUON MARS map ｜ About the map ｜ The temperature on Mars ｜ How far away Mars is

DATA: IAU / USGS Astrogeology · NASA MGS MOLA · NASA Mars Odyssey THEMIS