Mercury Crescent
As MESSENGER neared Mercury on Jan 14, 2008, the spacecraft took this image of the planet's full crescent. The image shows portions of Mercury previously seen by Mariner 10. However, when Mariner 10 flew by the planet at each of its encounters, the sun was nearly overhead. For this MESSENGER flyby, in contrast, the sun is shining obliquely.
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https://www.nasa.gov/image-detail/mercury-crescent/
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