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1909 VDB penny is used as a calibration target on Mars Rover

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The penny is a nod to geologists' tradition of placing a coin or other object of known scale as a size reference in close-up photographs of rocks, and it gives the public a familiar object for perceiving size easily when it will be viewed by MAHLI on Mars.
If this 1909 VDB penny ever makes is way back to Earth would be priceless, I think is a MS64BN


MT

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