Planets are believed to emerge from the accretion of particles in a disk of gas and dust as they whirl around the star.
行星被认为是由围绕恒星旋转的气体和尘埃组成的圆盘中的粒子累积而成。
It is hypothesized that the primordial cloud of dust and gas from which all the planets are thought to have condensed had a composition somewhat similar to that of Jupiter.
据推测，所有行星都是由尘埃和气体组成的原始云团凝聚而成，其组成与木星的组成有些相似。
A long tendril of colder gas and dust extends many light years into the void from the receding ionization front.
低温气体和尘埃长长的卷须从渐行渐远的电离前沿一直延伸到数光年远的太空。
A comet is an icy body that releases gas or dust.
彗星是一个释放着气体和尘埃的冰质天体。
This violent phase of consumption is the one that is readily observed, because the castoff energy turns the incoming gas and dust into a glowing cloud.
这个剧烈消耗的阶段是很容易被观测到的，因为这些被丢弃的能量把那些进入黑洞的气体和尘埃变成了一个灼热的云团。
Astrophysicists have found that when a supermassive black hole quickly devours gas and dust, it can generate enough radiation to abort all the embryonic stars in the surrounding galaxy.
天体物理学家发现，当一个巨大的黑洞快速吞噬宇宙中的气体和尘埃时产生的辐射，足够摧毁周围星系中初期形成的星体。
This NASA image shows starlight which is slowly destroying a wandering cloud of gas and dust in the Pleiades star cluster.
美国宇航局提供的这张图片显示出昂宿星团里正在缓慢破坏一个流浪尘气云的星光。
A molecular cloud is a region containing cool interstellar gas and dust left over from the formation of the galaxy and mostly contains molecular hydrogen.
分子云是一个包含冷却星际气体和尘埃的区域，这些气体和尘埃是星系形成之后的残留物，主要由氢分子组成。
Astronomers have long thought that a black hole ought to be surrounded by a torus of dust and gas.
天文学家长期认为黑洞应该是由一环尘埃和气体包围着的。
Its unusually large nucleus gave off a great deal of dust and gas - estimated at roughly 18 to 25 miles (30 to 40 kilometers) across - appeared bright to the naked eye.
它异常巨大的彗核释放出大量的尘埃和气体——其彗核直径估计有18到25英里(30到40公里)——使它能够被肉眼清晰地看见。
The star is a brown dwarf - and formed, like other stars, out of a cloud of dust and gas.
这颗恒星是褐矮星――像其他恒星一样，外部由尘埃和气体云构成。
Dust and gas envelop a cluster of massive stars called Pismis 24 in a new picture of a nebula in the constellation Scorpius.
这是一张来自天蝎星座的新照片，由尘埃和气体笼罩着的这团巨大恒星群叫做普日密斯24恒星群。
Many scientists think our solar system formed from a giant, rotating cloud of gas and dust known as the solar nebula.
许多科学家认为太阳和太阳系的其他部分是由一团称为“太阳星云”的巨大的旋转着的气体和尘埃星云形成来的。
Partly obscured by foreground dust, the nebula itself surrounds NGC 1893, a young galactic cluster of stars that energizes the glowing gas.
这片星云本身环绕着部分被前景上的星尘所掩盖了的NGC 1893，这是一个年轻的恒星星系群，它给发光的气体提供了能量。
The spectacular Horsehead Nebula is actually a projection of cold gas and dust extending from the dense Orion Molecular Cloud.
引人注目的马头星云实际上是低温气体和自稠密的猎户座分子云延伸而来的尘埃相互作用而形成的突起物。
When the sun formed, some 4.5 billion years ago, it was surrounded by a disk of gas and dust.
大约45亿年前，当太阳形成时，就被气体和尘埃的盘状物所围绕。
A network of dark, dense clouds of dust and gas sprawls across the constellation Vela.
黝黑浓密的尘埃和气体云形成的网络蜿蜒着穿过了船帆座(constellationVela)。
Captured here are the top of a three-light-year-tall pillar of gas and the dust that is being eaten away by the brilliant light from nearby bright stars.
照片所捕获的是由气体和尘埃所组成，高达3光年的巨柱的顶端。它被附近明亮恒星们的耀眼光芒所遮盖。
Planets form from a disk of gas and dust swirling around a young star.
行星是由围绕着年轻恒星旋转的气体和灰尘的盘状物所组成。
Now the galaxy is full of gas and dust, which could hide a distant supernova optically, but the remnant would still produce detectable radio waves and X-rays.
现在，星系充满了气体和灰尘，掩盖了遥远的超新星的可见性，但是(它的)残骸依然放射出可检测的无线电波和X射线。
The nebula gets its name because optical images show dust obscuring some of the nebula's glowing gas in a shape reminiscent of the arcade character.
星云所以取得这个名称，是因为它们的光学图像显示了尘埃把一些星云的发光气体模糊化地形成了使人联想到拱形特征。
Its unusually large nucleus gave off a great deal of dust and gas -estimated at roughly 18 to 25 miles (30 to 40 kilometers) across -appeared bright to the naked eye.
它异常巨大的彗核释放出大量的尘埃和气体——其彗核直径估计有18到25英里(30到40公里)——使它能够被肉眼清晰地看见。
For decades, astronomers have been confident that relatively low-mass stars such as our sun form by the gradual accretion, or buildup, of mass from a disk of gas and dust.
几十年来，天文学家已经确信质量相对较小的星体，如我们的太阳，是逐渐积累或建立自碟状气体或尘埃而形成的。
A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk.
极环星系是种稀有的星系类型，它们有着几乎和银盘平面垂直，呈环形公转的大量的恒星、气体和星尘。
A classic dark nebula, the Snake is a tendril of interstellar gas and dust about 650 light years away.
在经典黑暗星云中，蛇是星际气体和尘埃组成的卷须，长约650光年。
Astronomers in Japan say one of the best-known nebulae-the Trifid, in the constellation sagittarius-owes its splendor to a smashup between two clouds of gas and dust.
日本的天文学家说，最知名星云之一的人马座三裂星云，它的壮丽景观可正是由两朵气体和尘埃云的碰撞造成的。
To the right is a star-forming nebula of dust and gas, called S175.
在图片的右边是正在孕育着恒星的星云尘埃和气体，我们叫它S175。
To the right is a star-forming nebula of dust and gas, called S175.
在图片的右边是正在孕育着恒星的星云尘埃和气体，我们叫它S175。
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