这个定律被普遍认为同样适用于至少数十亿光年之远的星系。
This law is known to hold true for galaxies at a distance of at least several billion light years.
它来自射手座的方向；那个方向最近的恒星距离220光年。
It came from the direction of Sagittarius; the nearest star in that direction is 220 light-years away.
从一端到另一端，银河系布满星星的圆盘横跨12万光年，可以用肉眼和光学望远镜观察到。
From end to end, the Milky Way's starry disk, observable with the naked eye and through optical telescopes, spans 120,000 light-years.
那意味着我们最近的邻居星球离我们大约有100光年远，从天文学的角度来说，这几乎是一墙之隔。
That means that our nearest neighbours are perhaps 100 light years away, which is almost next door in astronomical terms.
游乐园中有许多广受欢迎的游乐项目，如森林河流之旅及根据《玩具总动员》中太空战警命名的巴斯光年星际历险。
The park will feature popular rides like Jungle River Cruise and a Buzz Lightyear Ride, named after the spaceman warrior in the movie "Toy Story".
被搜寻的星星离我们有几百光年远，所以它们的信号传到我们这里需要几百年，而我们的答复传到它们那里又需要几百年。
The stars being searched are hundreds of light years away, so it takes hundreds of years for their signal to reach us, and a further few hundred years for our reply to reach them.
在宇宙中最引人注目的能量工厂——距离地球数十亿光年的类星体和伽马射线爆发——中寻找这些物质的来源似乎是明智的。
It would seem sensible to seek the source of these in the universe's most conspicuous energy factories: quasars and gamma-ray bursts billions of light-years away from Earth.
它可以看到137亿光年以外的物体。
第一个是一对质量与木星差不多的行星，这对行星步调一致地围绕距离地球15光年的母恒星旋转。
The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep.
相互作用的两个星系相距数万光年。
The two interacting galaxies are separated from each other by tens of thousands of light-years.
詹姆斯·索尔特：光年(1975)。
我们经过11光年的旅行达到这个星球。
烟花星系的螺旋近四万光年。
Nearly 40,000 light-years across, the nearby spiral is fittingly referred to as the Fireworks Galaxy.
水母星云约5000光年远。
这块由巨星组成的区域横跨约一千光年。
The giant star-forming region is about 1, 000 light-years across.
该星团嵌在一个约110光年大的星云内。
The star cluster is embedded in a nebula, which spans some 110 light-years.
这幅壮观的景象蔓延了近50000光年。
对比一下，离太阳最近的恒星也在4光年之外。
For comparison, the closest star to the Sun is over 4 light-years away.
钱德拉能检测和成像数十亿光年之遥的X射线源。
Chandra detects and images X-ray sources that are billions of light years away.
大麦哲伦星云的直径大约为 15000光年。
The Large Magellanic Cloud is about 15, 000 light-years across.
格利泽581是一颗红矮星距离地球20.5光年。
它距地球128光年，在飞马座中刚好能被肉眼可见。
It is 128 light years from Earth, and is just visible to the naked eye in the constellation of Pegasus.
我们已经可以得到距离地球百万光年之外星系的照片了。
Now we have images of galaxies millions of light years away from Earth.
以NGC 6188的距离推测，这张图片宽约200光年。
At the estimated distance of NGC 6188, the picture spans about 200 light-years.
许多研究表明，超新星必须距离我们约75光年以内才会危害我们。
Numerous studies indicate that a supernova would have to be closer than about 75 light years to do us any harm.
霍格星系横越100 00光年，距天蛇星座6亿光年。
Hoag's Object spans about 100,000 light years and lies about 600 million light years away toward the constellation of the Snake (Serpens).
它将收集数百万光年外的恒星、星系等宇宙射线源的信息。
It will also gather information from cosmic radiation sources on stars and galaxies millions of light years away.
解说：透过星际望远镜可以看到距离地球三千光年的迷人的猫眼星云。
Explanation: Staring across interstellar space, the alluring Cat's Eye nebula lies three thousand light-years from Earth.
利用这项技术，他们测出距地球约63光年的一颗行星大气中含有甲烷。
They used it to detect methane in the atmosphere of a planet nearly 63 light-years away.
利用这项技术，他们测出距地球约63光年的一颗行星大气中含有甲烷。
They used it to detect methane in the atmosphere of a planet nearly 63 light-years away.
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