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Dec 1, 2009
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Mes'sier cat'alog



Astron.
a catalog of nonstellar objects compiled by Charles Messier in 1784 and later slightly extended, now known to contain nebulae, galaxies, and star clusters.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

MessierMessier number
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