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Up to now, we’ve never imaged Airy-0, a crater within Airy Crater that formerly was used to define zero longitude on Mars. That definition is now based on Viking Lander 1, but we wanted to image Airy-0 for cartographic interest. It was named in honor of the British Astronomer Royal Sir George Biddell Airy (1801–1892).


Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_070869_1750
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