The Fermi Space Telescope is so sensitive to these gamma ray bursts that it doesn't even need to be positioned right over a thunderstorm to detect the TGFs.

费米太空望远镜对这些伽马射线脉冲很灵敏，以至于它甚至不需要调整位置对准雷暴的正上方，就能来探测TGF信号。

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The Fermi Space Telescope found hints in 2009 of the telltale pattern associated with positrons in terrestrial gamma rays stemming from lightning storms.

费米太空望远镜在2009年就曾发现这一与正电子有关的特征现象的线索，地点正是在源于雷暴的地表伽马射线中。

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But how can terrestrial gamma rays reach Fermi's orbit in space?

但地表伽马射线如何能到达太空中安放费米镜的卫星呢？

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So when we detect gamma-rays from space, we know they signal intensely hot, extreme events.

CNN: Why gamma-ray burst shocked scientists

Now, an international team of astronomers has trained the Fermi space-based gamma ray telescope on V407 Cygni, a "binary" system comprising a white dwarf star and a red giant companion, 9, 000 light-years away.

BBC: Gamma rays from nova explosion surprise astronomers

Gamma rays have to be studied from space because they cannot penetrate the earth's atmosphere.

ECONOMIST: A new gamma-ray telescope has just been launched