英语单词分类 轻松记单词

extragalactic nebula

extragalactic nebula基本解释

河外星云

extragalactic nebula同义词

extragalactic nebula英英释义

Noun:
  • (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'"