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Dr. Tom Herring, director of the Jack C. Davis Observatory, shows off a thermal map of Mercury, while visitors wait for a supermoon eclipse to rise in the sky above Western Nevada College in Carson City, Nev., on Sunday Sept. 27, 2015.

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Observatory director to talk about French astronomer, legacy

Nearly 240 years have passed since Charles Messier created a catalog that made it easier for astronomers to observe objects in space.

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