氦是一种很轻的气体。
A bluish ribbon of light stretching from left to right across the picture might be a knot of gas ejected by the supernova.
一个从左延伸至右穿过整幅图片的浅蓝色光可能是由超新星喷发出的气体的集结体。
If you suspect a gas leak, do not strike a match or even turn on an electric light.
假如你怀疑有煤气泄漏，不要划火柴，甚至连电灯都不要开。
Light and radio waves are absorbed and scattered by interstellar gas and dust.
光波和无线电波能被星际气体和尘埃吸收及散射。
On Earth, atmospheric methane is generated by living organisms, but on Jupiter and other gas giants, methane is produced by light interacting with other chemicals in the atmosphere.
地球大气层中的甲烷是由活体生物产生的，而木星或其他气态行星上的甲烷是由光与大气层中其他化学物质相互作用而产生的。
But at infrared wavelengths bright light from nearby stars lights gas and dust up with beautiful purples, greens, and blues.
不过在临近恒星发出的红外波长光线的照射下，让它的气体和尘埃呈现出美丽的紫、绿和蓝色。
Recent computer modeling speculates the event would be violent, unleashing tremendous light as gas is trapped between the two black holes and then rushes toward the more massive one.
最近的计算机模式推测，这种合并事件是非常火爆的，它们释放出巨大的光芒，两个黑洞之间的气体被严重压缩，然后冲向更多的巨大的黑洞。
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。
Light traveling through different mediums, such as chilled sodium gas, does slow substantially, but this is because the light is being bounced between the atoms within the medium.
根据盖利森的意见，光可以通过不同的介质运行，如在通过冷冻的纳气时，光的速度实质上变慢了。然而这是因为光线在运行介质里的原子之间时，会反复地反弹。
Unlike reflection nebulae like DG 129, which reflects light from nearby stars, this nebula emits light from hot ionized gas that glows as it cools.
反射星云DG 129反射的是临近恒星的光芒，而照片中的星云光芒则是由于其中炙热的电离气体变冷时发出的。
The three sets of observations that purported to see methane on Mars all relied on the absorption lines which the gas imposes on light at specific wavelengths.
三组观测声称火星上有甲烷依赖于甲烷气体所影响的吸收(谱)线处在一个非常特别的波段上。
European nations worry about their dependency on Russian gas, particularly in the light of previous pipeline closures.
欧洲国家因其对俄罗斯天然气的依赖而忧心忡忡，尤其是在俄罗斯数次关闭输气管道之后。
The trick is to keep very light pressure on the gas pedal, just enough to feed a steady amount of fuel to the engine.
技巧是在油门上轻施压力，仅够供给引擎稳定量的燃料。
In both cases, high concentrations of the gas are dark, while low concentrations are light.
在两幅图中，气体密度越高的区域颜色也就越深，低密度区则更浅。
Composed of denser cooler gas and dust the tadpoles are around 10 light-years long, potentially sites of ongoing star formation.
蝌蚪是由密集的寒冷的气体和星尘所组成的，大约10光年长，可能存在正在形成的恒星。
Stars and planets form within swirling clouds of dust and gas that visible light cannot penetrate, but which infra-red radiation can.
那些漩涡状的尘埃气体云是恒星和行星诞生的摇篮，虽然可见光无法穿透其间，但是红外光却可以做到。
Glowing visible filaments, shown in yellow, and X-ray hot gas, shown in blue, span about 30 light-years in our neighboring galaxy, the Large Magellanic Cloud.
可见光波段的发光丝状物，用黄色显示，X射线波段热气体，用蓝色显示，宽30光年，在我们的近邻星系大麦哲伦云中。
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。
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。
There is also some evidence that the gas was used for light.
也有证据说明这些气体也被用来照明。
The monster, on the right, is actually an inanimate pillar of gas and dust that measures over a light year in length.
右边的怪物，实际上是无生命的气体和尘埃柱，据测长度超过一光年。
Strict economy in coal, gas, and electric light.
严格节约煤、汽油和照明用电。
The gas breaks down in ultraviolet light from the sun, leading scientists to wonder how methane is being resupplied into the moon's atmosphere.
这种气体会在太阳紫外线照射下分解，这就让科学家们迷惑了：这个星球大气中大量甲烷是如何被补充的呢。
The cluster surrounding M87 is filled with hot gas glowing in X-ray light (and shown in blue) that is detected by Chandra.
钱德拉探测到环绕M 87的星团充斥着炙热的气体所发出的X射线(在图像中呈蓝色)。
Moving closer, the welcoming glow of gas-lantern light in home Windows beckons.
靠得更近时，看见有人家的窗户透出煤气罩灯的欢迎之光在示意。
Imprinted on that light is information about the gas giant's atmosphere, which yields clues about the properties of Jupiter's high-altitude haze above the cloud tops.
那光线中携带的信息就恰好说明了木星大气层——那团远在云层之上的高海拔的薄雾——的详细情况。
The mirror, in this case, is a vast blob of gas about 70,000 light-years away from the center of a spiral galaxy, where the quasar resides.
从这种情况看，这个大家伙实质上是来自70000光年之外的星系螺旋线（宇宙射线）的视像，也即是类星体所在之处。
Of course, that string is a cosmic trail of gas, dust, and stars about 22, 000 light-years long.
当然，那条线是由气体、尘埃、恒星组成的约22000光年长的宇宙余迹。
A dark stream of dust meanders through the brightly glowing gas of the Lagoon Nebula, about 5,000 light-years from Earth.
一条由尘埃构成的深色溪流蜿蜒缓慢地流经珊瑚星云的明亮炽热的气体，珊瑚星云约距离地球5千光年。
A dark stream of dust meanders through the brightly glowing gas of the Lagoon Nebula, about 5,000 light-years from Earth.
一条由尘埃构成的深色溪流蜿蜒缓慢地流经珊瑚星云的明亮炽热的气体，珊瑚星云约距离地球5千光年。
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