相關字詞組
最近查詢過的單字

天火字典

英英字典: planetary_nebula

planetary nebula   (TTS Sound)



Overview of noun planetary_nebula

The noun planetary nebula has 1 sense


  • planetary nebula -- (a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star)

返回 →