SETI Institute on Nostr: PPOD: Mars' Argyre Basin, an 1800 km-wide impact crater in the southern hemisphere, ...

PPOD: Mars' Argyre Basin, an 1800 km-wide impact crater in the southern hemisphere, is probably the best-preserved large impact basin in the Solar System. This oblique image, taken looking northeast across the crater, was taken by Viking Orbiter 1 on July 25, 1976. Credit: NASA

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