Region
Mars (Planet)
264
Outer space
26
United States
20
Earth (Planet)
10
Moon
7
Venus (Planet)
6
Antarctica
2
Deep space
2
Europa (Satellite)
2
Jupiter (Planet)
2
Solar system
2
Amazonis Planitia (Mars)
1
Australia
1
California
1
Candor Chasma (Mars)
1
Great Britain
1
Greenland
1
Hanksville
1
Illinois
1
McMurdo Dry Valleys (Antarctica)
1
Olympus Mons (Mars)
1
Russia
1
Soviet Union
1
Svalbard (Norway)
1
Titan (Satellite)
1
Utah
1