An artist's illustration shows a supermassive black hole with millions to billions times the mass of our sun at the center, surrounded by matter flowing onto the black hole in what is termed an ... more 
An artist's illustration shows a supermassive black hole with millions to billions times the mass of our sun at the center, surrounded by matter flowing onto the black hole in what is termed an accretion disk in this NASA illustration released on February 27, 2013. REUTERS/NASA/JPL-Caltech/Handout less 
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Thu, Feb 11, 2016 1:05 PM EST