Happy #PresidentsDay! This Lincoln penny is on Mars as a calibration target for NASA’s Curiosity Mars Rover.
The image was taken by the Mars Hand Lens Imager (MAHLI) aboard Curiosity in Gale Crater. It's a 1909 cent, from the first year Lincoln pennies were minted, the centennial of Abraham Lincoln's birth.
"The penny is on the MAHLI calibration target as a tip of the hat to geologists'...
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