From end to end, the Milky Way's starry disk, observable with the naked eye and through optical telescopes, spans 120,000 light-years.
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。
It came from the direction of Sagittarius; the nearest star in that direction is 220 light-years away.
它来自射手座的方向；那个方向最近的恒星距离220光年。
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.
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 is 870 light-years from Earth.
它距离地球870光年远。
The pair are about 31 million light-years distant.
这一对星系相距大约3千1百万光年。
The Jellyfish Nebula is about 5, 000 light-years away.
水母星云约5000光年远。
The magnificent vista spans nearly 50, 000 light-years.
这幅壮观的景象蔓延了近50000光年。
Gliese 581 is a red dwarf star 20.5 light-years from Earth.
格利泽581是一颗红矮星距离地球20.5光年。
It is actually a triple-star system about 500 light-years away.
天蝎座pi是一个三星系统，距地球500光年。
Of course, the cosmic elephant's trunk is over 20 light-years long.
当然，这个星际象鼻长达 20光年以上。
At that distance, this image would be about 300 light-years across.
在那个距离，这张图约宽300光年。
The Crab Nebula is at a distance from us of about 5,000 light-years.
蟹状星云距离我们，大概是5000光年。
Broader than the disk, NGC 660's ring spans about 40, 000 light-years.
NGC 660的环比盘更为宽广，直径大约为40000光年。
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。
IC 410 lies some 12, 000 light-years away, toward the constellation Auriga.
IC 410大约在12000光年之外，在御夫星座方向上。
At the estimated distance of NGC 6188, the picture spans about 200 light-years.
以NGC 6188的距离推测，这张图片宽约200光年。
M13 is home to over 100,000 stars and located at a distance of 25,000 light-years.
M 13是超过十万颗恒星的家园，距我们25000光年。
M13 is home to over 100, 000 stars and located at a distance of 25, 000 light-years.
M 13是超过十万颗恒星的家园，距我们25000光年。
In fact, two of the 56 stars within 15 light-years are already known to have planets.
实际上，在15光年内的56颗恒星中有两颗已经确知带有行星了。
Sharpless 140 lies almost 3, 000 light-years from Earth in the constellation Cepheus.
Sharpless 140距离地球约3000光年，位于仙王星座内。
The galaxy spans about 30, 000 light-years, one-third of the size of our Milky Way galaxy
这个星系跨度约为3万光年，规模大约是我们银河系的1/3。
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。
The quasar is known as SDSS J0013+1523 and located about 1.6 billion light-years from Earth.
这一类星体叫做SDSSJ0013+1523，位于离地球约16亿光年处。
Arp 273 lies in the constellation Andromeda, roughly 300 million light-years away from Earth.
Arp 273位于仙女座，距地球大约3亿光年。
The two interacting galaxies are separated from each other by tens of thousands of light-years.
相互作用的两个星系相距数万光年。
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。
In these cases, just three or four of the thousand stars remained within 330 light-years of Earth.
在此情况下，数千颗恒星中只有3到4颗会停留在距地球330光年的范围内。
In these cases, just three or four of the thousand stars remained within 330 light-years of Earth.
在此情况下，数千颗恒星中只有3到4颗会停留在距地球330光年的范围内。
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