The size of the nebula at this stage is inversely proportional to its mass.
这个阶段的星云大小与其质量成反比。
As the nebula collapsed caused by its gravity, it spun faster and flattened into a disk.
当星云因其重力而坍缩时，它旋转得更快，并压扁成一个盘状。
It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast.
星云的大部分都被加热到如此极端的温度似乎是不太可能的，而巨大的星云区域不可能这么快就失去热量。
我们创造了一座星云！
这是一座星云！
The Eskimo nebula is clearly a planetary nebula.
爱斯基摩星云显然是一个行星星云。
How was the unusual Red Rectangle nebula created?
这个不寻常的红色矩形星云是怎么形成的？
Near the image bottom lies IC 4592, the Blue Horsehead nebula.
在照片底端附近是有蓝色马头星云之称的IC 4592。
L the Horsehead nebula in Orion is the best-known dark nebula.
l猎户星座中的马头星云是最著名的暗星云。
Emission nebula Sharpless 249 fills the field at the upper left.
发射星云沙普利斯249弥漫在图像的左上部。
The star cluster is embedded in a nebula, which spans some 110 light-years.
该星团嵌在一个约110光年大的星云内。
L the Great nebula of Orion is a glowing nebula just visible to the naked eye.
l猎户座星云是只用肉眼就可以看见的星云。
The nebula was named after its resemblance to a dumbbell when seen in visible light.
该星云因在可见光下观测其形似哑铃而由此得名。
Radiation from hot, young stars has slowly eroded the nebula over millions of years.
数百万年来炎热的年轻恒星发出的辐射不断的侵蚀着这个星云。
A new panorama of a cosmic nebula offers an up-close glimpse of baby stars being born.
关于宇宙星云的最新发现为我们提供了一次近距离观察婴儿恒星诞生的机会。
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。
Intriguing details of the nebula are visible in the above image shown in scientific colors.
上图中可以看到以科学着色法显示出的该星云引人探秘的细节。
Instead the nebula glows with light from hydrogen gas being charged by the stars' radiation.
星云的光辉则是来自在恒星强烈辐射作用下带电的氢气。
But a few grains have survived from the primitive nebula that the solar system condensed from.
但是一些颗粒是来自于凝成太阳系的原始星云。
Violent stellar winds and powerful radiation from massive stars sculpt the surrounding nebula.
猛烈的恒星风和强有力的大质量恒星辐射塑造着星云的环境。
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。
Our solar system arose from a large, rotating cloud of interstellar debris called the solar nebula.
太阳系形成于一个巨大的旋转星云——太阳系星云，星云中含有大量的星际残骸。
Braided, serpentine filaments of glowing gas suggest this nebula's popular name, The Medusa nebula.
象辫子一样层层卷绕的发光丝状气体暗示了这个星云的俗名：水母(美杜萨)星云。
The nebula is shown above in unprecedented detail as captured recently by the Hubble Space Telescope.
上面照片最近由哈勃太空望远镜拍摄，显示了星云空前的细节。
A recent Hubble image of part of the nebula has uncovered a very massive star escaping from the region.
哈勃最近拍的这个星云的局部图像表明一颗质量十分巨大的恒星正逃离这个区域。
Why then would the gas that is streaming away create an ant-shaped nebula that is distinctly not round?
为什么气体流走时创造了一个蚂蚁形状的星云而明显不是圆形？
The nebula is a large supernova remnant, an expanding cloud born of the death explosion of a massive star.
该星云是超新星的遗迹，是一个大质量的恒星死亡爆炸时的扩散云气形成的。
The nebula is a large supernova remnant, an expanding cloud born of the death explosion of a massive star.
该星云是超新星的遗迹，是一个大质量的恒星死亡爆炸时的扩散云气形成的。
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