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NASA has found some of the biggest and oldest black holes we've ever seen - ScienceAlert
URL: http://www.sciencealert.com/nasa-finds-some-of-the-biggest-and-oldest-black-holes-we-ve-ever-seen
Submitted: Thu Feb 02 2017
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CT: UFOSeek News 2015: NASA has found some of the biggest and oldest black holes we've ever seen - ScienceAlert
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NASA has picked up intense gamma ray signals coming from a set of ancient galaxies. The gamma rays are being blasted out by objects known as blazars, which surround some of the biggest and most powerful black holes we've ever encountered.