Messier number

短语

词形变化

Messier numbers 复数 Messier numbers

释义与例句

n.
  1. 1.

    A catalogue number used to identify any one of more than one hundred galaxies, nebulae, and other deep-sky objects visible in the night sky; the designation formed by the surname Messier or letter M being prepended to the number, as in Messier 31 or M31 (the Andromeda Galaxy).

    天文

词源

From Charles Messier (1730-1817), the French astronomer who first published his Catalogue of Nebulae and Star Clusters in 1774.

来源：wiktionary