The story
Named on September 26, 2012 by the International Astronomical Union as a valley in the Aeolis quadrangle on the planet Mars Aeolis (“Aeolis quadrangle”).
Etymology from Wiktionary, CC BY-SA 4.0.
Peace Vallis
Today it means: A valley within Gale Crater near the landing site (Bradbury Landing) of the Curiosity rover on the planet Mars. Full definition →