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).

Related Sources

  • Cross Reference for "Messier number"
    • Wikipedia article on the Messier objects
    • View More
29 votes

How would you define Messier number?

All the definitions on AZdictionary were written by people just like you. Now's your chance to add your own!