Until quite recently, scientists believed that most gamma-rays are produced by cataclysmic events in distant galaxies, such as the death of supermassive stars.

直到最近，科学家们才相信，大部分的伽马射线是由遥远星系中剧烈的宇宙活动产生的，比如超大质量恒星的死亡。

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At its center, nearly every large galaxy contains a supermassive black hole surrounded by a big bulge of stars.

在每个星系的中心几乎都存在一个超大质量的黑洞，而这个黑洞的周围又包围着一个大核球。

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Astrophysicists have found that when a supermassive black hole quickly devours gas and dust, it can generate enough radiation to abort all the embryonic stars in the surrounding galaxy.

天体物理学家发现，当一个巨大的黑洞快速吞噬宇宙中的气体和尘埃时产生的辐射，足够摧毁周围星系中初期形成的星体。

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The list of top discoveries made with Hubble reads like the hit parade of astronomy: a mysterious new "dark energy" causing the accelerating expansion of the universe, distances to other galaxies, the supermassive black holes at their centers, the age of the universe, planet formation around other stars, searches for signs of extraterrestrial life -- and the list goes on.

CNN: Space is still the new frontier

Fermi has been a tremendous success at examining some of the most high-energy processes in the cosmos, publishing a catalogue filled with details of the spinning neutron stars known as pulsars, and a wide array of "active galactic nuclei" - probably supermassive black holes.

BBC: Fermi telescope may change to dark matter hunting