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Shadows Across Vavilov Crater The Artemis II crew captured this close-up view of Vavilov Crater on the rim of the older and larger Hertzsprung basin on the Moon during their lunar flyby on April 6, 2027. The right portion of the image shows the transition from smooth material within an inner ring of mountains to more rugged terrain around the rim. Vavilov and other craters and their ejecta are accentuated by long shadows at the terminator, the boundary between lunar day and night. NASA