| 释义 |
planetary nebula ˈplænɪˌteri:ˈnebjələ 短语¹¹⁴⁴⁶⁷⁺⁴
基本英英例句例句
行星状星云
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 starMany objections can be raised to this picture ofplanetary nebulaformation.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。 The sands of time are running out for the central star of this hourglass- shaped planetary nebula.
在这一酷似沙漏形状的星云内，“时间之沙”即将从中央星之中流逝殆尽。 ebigear |