Messier number

EnglishEdit

EtymologyEdit

From Charles Messier (1730-1817), who first published Nebulae and Star Clusters in 1780 as a listing of visible objects in the night sky that were not stars. Objects in Messier's catalog are numbered, and the letter M (for Messier) is prepended to these numbers.

NounEdit

Messier number (plural Messier numbers)

  1. (astronomy): A catalog number used to name and record approximately 100 galaxies, nebulae, and other objects visible in the night sky that are not stars. Objects in Messier's catalog of Nebulae and Star Clusters are numbered, and the letter M (for Messier) is prepended to these numbers, as in M31 (the Andromeda Galaxy) or M13 (the globular cluster in Hercules).

See alsoEdit

Last modified on 20 June 2013, at 13:44