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。

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Gamma-ray bursts last for an average of about 30 seconds.

爆炸发出类似伽马射线的高能射线，但伽马射线的爆发通常只持续约30秒钟。

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The telescopes will also be good at spotting supernovae and gamma-ray bursts.

用这些望远镜对超新星及伽马射线爆发进行定位也不错。

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Gamma ray bursts are large, high energy explosions that last only a short period of time.

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Thus, the shape and metals of W49B show the explosion has the jets we associate with gamma-ray bursts.

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Too bright, it appears, for any of the existing theories of gamma-ray bursts.

ECONOMIST: An illuminating burst