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Crescent Moon with Earthshine and Saturn. The rest of the Moon is visible due to Earthshine, which is the fainter reflection of sunlight from the Earth to the Moon and back again. This is a waning crescent Moon. Saturn is the faint coloured dot to the upper right of the Moon, with the smaller nearby dot its moon Titan. Photographed during nautical twilight on 2 February 2019, from Alandroal, Portugal. (KEYSTONE/SCIENCE PHOTO LIBRARY/MIGUEL CLARO/SCIENCE PHOTO LIBRARY)