The astronomical body that XXX is on is what?
Aeolis Palus
Aeolis Palus is a plain between the northern wall of Gale Crater and the northern foothills of Aeolis Mons on planet Mars and is centered at 4.47°S 137.42°E. The NASA Mars Science Laboratory mission delivered a rover to the crater plain in August 2012 to begin an extended mission of exploration and planetary science.
Mars