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This is Scientific American 60-Second Space. I'm Clara Moskowitz. Got a minute?
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Inside most galaxies a supermassive black hole lurks.
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But one galaxy about 4 billion light-years from us was recently discovered to have not one, not even two, but three gigantic black holes at its center.
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Such triple systems appear to be extremely rare, only four are known.
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The newfound system includes two black holes orbiting each other very closely, about 450 light-years apart, with a third black hole a bit farther out.
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The central pair zoom around each other at a fast clip, about 300 times the speed of sound on Earth.
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The hole trinity also represents the tightest trio of black holes known to date.
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It's described in the journal Nature.
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As these objects continue to orbit at the center of their galaxy, gravity will eventually pull them closer and closer together.
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Ultimately, they may even merge.
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Researchers hope this triple-black-hole system may be a good place to look for space-time ripples called gravitational waves.
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As their orbits shrink, the black holes should radiate away some of their orbital energy as the sought-after gravitational waves, predicted by Einstein a century ago.
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Thanks for the minute, for Scientific American 60-Second Space.I'm Clara Moskowitz.
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显示原文 =This is Scientific American 60-Second Space. I'm Clara Moskowitz. Got a minute?
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显示原文 =Inside most galaxies a supermassive black hole lurks.
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显示原文 =But one galaxy about 4 billion light-years from us was recently discovered to have not one, not even two, but three gigantic black holes at its center.
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显示原文 =Such triple systems appear to be extremely rare, only four are known.
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显示原文 =The newfound system includes two black holes orbiting each other very closely, about 450 light-years apart, with a third black hole a bit farther out.
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显示原文 =The central pair zoom around each other at a fast clip, about 300 times the speed of sound on Earth.
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显示原文 =The hole trinity also represents the tightest trio of black holes known to date.
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显示原文 =It's described in the journal Nature.
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显示原文 =As these objects continue to orbit at the center of their galaxy, gravity will eventually pull them closer and closer together.
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显示原文 =Ultimately, they may even merge.
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显示原文 =Researchers hope this triple-black-hole system may be a good place to look for space-time ripples called gravitational waves.
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显示原文 =As their orbits shrink, the black holes should radiate away some of their orbital energy as the sought-after gravitational waves, predicted by Einstein a century ago.
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显示原文 =Thanks for the minute, for Scientific American 60-Second Space.I'm Clara Moskowitz.
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- 单句循环：关
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- 单句循环：∞