This photo was taken 90 minutes after its closest approach Monday and shows a bright crater near the middle called Kuiper which was first discovered by Mariner 10 in the 1970s. A new discovery is the large pattern of rays that extend from the northern region of Mercury to regions south of Kuiper.
October 7, 2008 11:52 AM PDT
Photo by: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
| Caption by: Andy Smith
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