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星云的残余气体充斥星际空间。The remnant nebular gas pervades the interplanetary space.

新星进入星云阶段之后，不能使用常规的恒星观测的化归公式。Point 1. is not observed, when the Novae are in nebular stage.

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热恒星的紫外辐射使星云发光。Ultraviolet radiation from the hot star powers the nebular glow.

关于太阳系起源的星云假说。Astronomy the nebular hypothesis of the origin of the solar system.

在彩虹星云中，星云尘埃物质围绕着一颗炙热的年轻恒星。Within the Iris, dusty nebular material surrounds a hot, young star.

而最终电子会与原子再次结合，产生可见的星云光芒。The electrons eventually recombine with the atoms to produce the visible nebular glow.

吴同椿的星云世界是用中国画的特色来表现的。Wu Tongchun's nebular art is expressed by the character of traditional Chinese painting.

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太阳系原始星云盘内木星和土星区域，尘粒先形成行星的固态核。In the Jupiter-Saturn region of the nebular disk, grains accumulated to form planetary cores.

从天鹅座中的明亮恒星天津四往东北方向寻找，就能找到这一小片星云状光斑！Look for a small nebular patch north-east of bright star Deneb in the constellation of Cygnus.

这种外观运动可能是由高能回旋射束扫过了星云物质后造成。The apparent motion could well be caused by an energetic rotating beam sweeping across the nebular material.

但是，诞生于星云内的年轻大质量恒星最终激发了星云内到处弥漫的光和热。But, formed within the nebula, that cluster's young, massive stars ultimately power the pervasive nebular glow.

如果已知星云气体的温度，则湍流的大小可直接从观测的谱线宽度得出。The magnitude of the turbulence then follows directly from the observed line with if the nebular gas temperature is known.

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如果一个原行星足够大，形成足够快，它的重力会拉入星云的气体，它就会变成一个巨型气体行星。If a protoplanet was large enough, soon enough, its gravity would pull in the nebular gas, and it would become a gas giant.

从N44内炽热的年轻亮星发出的恒星风和强辐射，激发并雕塑了炽热星云气体的暗条和流线。Winds and intense radiation from hot, young, luminous stars in N44 excite and sculpt filaments and streamers of the glowing nebular gas.

2004年，20幅星云美术作品应邀参加北京天文馆新馆落成典礼暨首届中国太空美术作品展览。In 2004, 20 of his nebular art paintings were shown at the 1st "Chinese Outer Space Art Exhibition" for Beijing Planetarium opening ceremony.

本文分析了星云盘外缘区的结构，论证了那里不可能存在彗星形成带。This paper analyses the structure of the outer edge region of the solar nebular disk, and shows that no formation zone of comets can exist there.

但是，这片美丽的宇宙景色被星云尘埃遮蔽了，只能在斯皮策太空望远镜利用红外光拍摄的影像中看到。Still, this remarkable cosmic vista is largely obscured by nebular dust and only revealed here in penetrating infrared light by the Spitzer Space Telescope.

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这张生动的假色影像还突出了氢，硫和氧元素的作用，在强紫外线辐射下，星云发出炽热的光芒。The dramatic false-color image also highlights the contributions of hydrogen, sulfur, and oxygen, energized by intense ultraviolet radiation, to the nebular glow.

如果原行星不够大，形成不够快，它便依旧由岩石和冰组成。If a protoplanet was large enough, soon enough, its gravity would pull in the nebular gas, and it would become a gas giant. If not, it would remain a rocky or icy body.

平时，我们是看不见这些物质的，但是，我们通过星云这个背景可以看见它的一部分，它就像是一条长长的灰尘组成的细线，或者是一个一个很小的椭圆形的结。Normally this material is invisible, but some of it can be seen in silhouette against the nebular background, as long dust lanes and a small, dark, elliptical-shaped knot.