A South Polar Pit or an Impact Crater?
June 02, 2017 ・0 comments ・Topic： happening now NASA trending
This observation from NASA's Mars Reconnaissance Orbiter show it is late summer in the Southern hemisphere, so the Sun is low in the sky and subtle topography is accentuated in orbital images. via NASA http://ift.tt/2s25Hnd powerd by primes
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