銀ぎん河が系けい外がい星せい雲うん

noun

extragalactic nebula

Obsolete term from early 20th-century astronomy, used before galaxies outside the Milky Way were clearly distinguished from nebulae. Replaced by 銀河 (sense 2) or 系外銀河 in modern usage.

See also: 銀河

• 「銀ぎん河が系けい外がい星せい雲うん」という言こと葉ばは、かつてアンドロメダ銀ぎん河がなどを指さすのに使つかわれた。

  The term 銀河系外星雲 was once used to refer to objects like the Andromeda Galaxy.