Read Edit View history 马蹄星云 Mǎtíxīngyún Horseshoe Nebula Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 马蹄星云/ 馬蹄星雲 Mǎtíxīngyún Horseshoe Nebula Omega or Horseshoe Nebula M17 马蹄星云是一个著名的发射星云。 Edit Delete References Add reference No references for this word.