extragalactic nebula

• 河外星云

extragalactic nebula的英文翻译是什么意思，词典释义与在线翻译：

英英释义

Noun:

1. (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'"
   

extragalactic nebula的相关资料：

近反义词

【近义词】

• galaxy 银河