銀河系外星雲 ぎんがけいがいせいうん Meanings Noun extragalactic nebula See also: 銀河 (ぎんが). Kanji 銀 silver. Read as ギン. 河 river 系 system. Read as ケイ. 外 outside. Read as ガイ. 星 star. Read as セイ. 雲 cloud. Read as ウン. Word lists Astronomy Jinuma: Japanese Dictionary · Word lists