A Red Cent on a Red Planet: Curiosity’s 1909 Lincoln Penny

On March 9, 2017, NASA’s Curiosity rover took this picture with its turret-mounted MAHLI camera of the calibration target installed near the “shoulder” of its robotic arm. In addition to color chips and a metric line graph, the target also includes a U.S. coin: a 1909 Lincoln penny, adhered heads-up. Curiosity’s coin isn’t just for good luck…