Read Edit View history 河外星云 héwàixīngyún extragalactic nebula Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 河外星云/ 河外星雲 héwàixīngyún extragalactic nebula 仙女座大星云曾被认为是一个河外星云。 Edit Delete References Add reference No references for this word.