• Definition for "Messier number"
    • : A catalog number regularly name and record…
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  • Cross Reference for "Messier number"
    • Wikipedia article on the Messier objects
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Messier number definition

  • noun:
    • : A catalog number regularly name and record around 100 galaxies, nebulae, along with other items noticeable when you look at the evening sky which are not movie stars. Objects in Messier's catalog of Nebulae and celebrity Clusters tend to be numbered, in addition to letter M (for Messier) is prepended to those figures, as with M31 (the Andromeda Galaxy) or M13 (the globular group in Hercules).
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