Messier catalog

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Mes′sier cat′alog

(ˈmɛs iˌeɪ, mɛsˈyeɪ)
a catalog of nonstellar objects that lists nebulae, galaxies, and star clusters.
[after Charles Messier (1730–1817), French astronomer, who compiled it in 1784]
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Other appendixes present astronomical and physical constants, solar system data, the constellations, the brightest and nearest stars, stellar data, and the Messier catalog and subsection headings have been added.