2 文書を見つけるための辞書。

• nebula
• 星雲
• an immense cloud of gas (mainly hydrogen) and dust in interstellar space
• 恒星間の空間のガスと塵の長大な雲（主に水素）

• galaxy, extragalactic nebula
• 銀河, 天の川, ギャラクシー, 小宇宙, 星雲, 銀河系, 天の河
• (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust; "`extragalactic nebula' is a former name for `galaxy'"
• 星系の集まり