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.
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.
我们经过11光年的旅行达到这个星球。
现在造星区域被局限在星系核心周围5000光年的范围内。
The star-making region is now confined to about 5, 000 light-years around the core.
这个系统与我们只有9光年的距离，在天文学范畴内就是咫尺之遥。
The system is just nine light years away, a mere stone's throw in astronomical terms.
这幅图像显示了距地球5000光年的罗赛塔星云的恒星诞生区域。
Located about 5,000 light years from Earth, this composite image shows the Rosette star formation region.
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.
这个稠密的星团由几百万颗恒星组成，分布在约120光年的尺度上。
The dense cluster is made up of several million stars in a volume only about 120 light-years across.
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.
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.
这是一次距地球16万光年的爆发，最重要的是，中微子和光子几乎同时到达地球。
This was an explosion about 160, 000 light years from earth. The thing is, the neutrinos and the photons from the explosion reached us at almost exactly the same time.
在银河盘面两端，发现了两个长达30,000光年的东东，它们被称作费米尔泡。
Two 30,000 light-year-long blobs called Fermi bubbles have been discovered on either side of our galactic plane. John Matson reports
智利拉息拉天文台更强大的2.2米望远镜聚焦于直径100光年的礁湖星云。
The far more powerful 2.2-meter telescope at La Silla Observatory in Chile focuses on the Lagoon Nebula, 100 light-years across.
这是一次距地球16万光年的爆发，最重要的是，中微子和光子几乎同时到达地球。
This was an explosion about 160,000 light years from earth. The thing is, the neutrinos and the photons from the explosion reached us at almost exactly the same time.
000立方光年的气体被加热到1000万华氏度——约太阳核心温度的二分之一。
000 cubic light years of gas have been heated to a temperature of over 10 million degrees Farenheit here — about half the temperature of the Sun's core.
2002年，钱德拉提供的数据推动了两个相距仅3,000光年的合并黑洞的发现。
In 2002, Chandra data led to the discovery of two merging black holes, which are a mere 3,000 light years apart.
2002年，钱德拉提供的数据推动了两个相距仅3,000光年的合并黑洞的发现。
In 2002, Chandra data led to the discovery of two merging black holes, which are a mere 3, 000 light years apart.
研究团队发现距地球35亿光年的星系正好精确的按照广义相对论所预测的一样聚集。
The team found that the galaxies, located up to 3.5 billion light-years from Earth, are clustered together in precisely the way that general relativity predicts.
它们通过窥视一位天文学家列出的318个离地球三亿光年的活跃星系而完成了这个试验。
They did this by taking a peek at an astronomers' catalogue of 318 active galaxies located within 300m light years of Earth.
我们经常在新闻和科学杂志里看到报道，它涉及数以万的，百万的——甚至十亿光年的距离。
We often see reports in newspapers and scientific journals that refer to distances of tens, to hundreds to millions — even billions — of light-years.
根据我的同事伊恩·奥尔良的一篇早期的文章，电磁波只能扩散到离地球100光年的范围。
As my colleague Ian o 'neill pointed out in an earlier article, electromagnetic waves from telecommunications leaking off the Earth have now expanded out to a radius of merely 100 light-years.
这个天空中的恒星都市，是三角座星系最大的恒星托儿所，贯穿了将近1500光年的距离。
The star "metropolis" is Triangulum's largest star nursery, stretching about 1, 500 light-years across.
这个天空中的恒星都市，是三角座星系最大的恒星托儿所，贯穿了将近1500光年的距离。
The star "metropolis" is Triangulum's largest star nursery, stretching about 1,500 light-years across.
强烈的X射线爆炸引起天文学家们的注意，它发生在到离地球大约7亿光年的星系中心附近。
A powerful X-ray blast drew the attention of astronomers to the event, located near the center of a galaxy about 700 million light-years from Earth.
这幅高清望远镜图像显示的是距地15 000光年的半人马座欧米伽球状星团（NGC 5139）。
Featured in this sharp telescopic image, globular star cluster Omega Centauri (NGC 5139) is some 15, 000 light-years away.
EpsilonEridani位于波江星座以外10光年的地方，地球的夜空中目力可及。
Epsilon Eridani is located about 10 light-years away in the constellation Eridanus and is visible in the night skies with the naked eye.
这些恒星非常紧密地簇拥在一个直径大约150光年的球型空间里，他们在这个星团中旋转，直至生命耗尽。
These stars are packed so closelytogether in a ball, approximately 150 light-years across, that theywill spend their entire lives whirling around in the cluster.
欧洲的天文卫星HIPPARCOS曾用这样的方法测出了超过10万个离太阳数百光年的恒星。
The European satellite HIPPARCOS used this approach to measure the distance to more than 100, 000 stars that lie several hundred light years from the Sun.
欧洲的天文卫星HIPPARCOS曾用这样的方法测出了超过10万个离太阳数百光年的恒星。
The European satellite HIPPARCOS used this approach to measure the distance to more than 100,000 stars that lie several hundred light years from the Sun.
欧洲的天文卫星HIPPARCOS曾用这样的方法测出了超过10万个离太阳数百光年的恒星。
The European satellite HIPPARCOS used this approach to measure the distance to more than 100,000 stars that lie several hundred light years from the Sun.
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