planetary nebula是什么意思 planetary nebula怎么读
planetary nebula的英文翻译是什么意思，词典释义与在线翻译
Noun:- 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
planetary nebula的用法和样例
- Many objections can be raised to this picture of planetary nebula formation.
形成行星状星云的这一图象可能会引起许多异议。 - This image from the Hubble Space Telescope reveals the Cat&squots Eye Nebula to be one of the most complex planetary nebulae known.
这张来自哈伯太空望远镜的影像，透露出猫眼星云是现知结构最复杂的行星状星云之一。
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