Read Edit View history 河外星云 héwàixīngyún extragalactic nebula Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 河外星云/河外星雲 · héwàixīngyún · extragalactic nebula 2026/03/04 河外星云 / 河外星雲 héwàixīngyún extragalactic nebula extragalactic nebula 仙女座大星云曾被认为是一个河外星云。 created sense Mar 4, 2026, 02:25 AM