网络释义专业释义英英释义
行星状星云(planetary nebula，PN)是质量小于8倍太阳质量的恒星演化到生命晚期，逐渐膨胀成红巨星阶段时，外层大气物质向太空逐渐扩张的结果，通常呈现同心圆状...
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bipolar planetary nebula 双极行星状星云
proto-planetary nebula 原行星状星云 ; 原始行星状星云
The Rotten Egg Planetary Nebula 行星状星云
pre-planetary nebula 前行星状星云
bipolar r planetary nebula 双极行星状星云
Planetary nebula luminosity function 行星状星云亮度函数
planetary nebula
- n. 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
以上来源于: WordNet
柯林斯英汉双解大词典
planetary nebula
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1.
N an expanding shell of gas surrounding a dying star, formed from matter ejected from the star's outer layers; the gas is ionized by the remaining hot stellar core, emitting light in the process 行星状星云
双语例句
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The Eskimo nebula is clearly a planetary nebula.
爱斯基摩星云显然是一个行星星云。
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Our own sun will blossom into a planetary nebula when it dies in about five billion years.
大约50亿年后，我们的太阳死去时，也会变成行星状星云。
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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。
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