銀ぎん河が系けい外がい星せい雲うんぎんがけいがいせいうんじ字FuriganaMeanings1nounextragalactic nebulaobsolete termastronomy›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
