Newslink: Deepest-Ever X-Ray Image of Space Captures Countless Black Holes

http://ift.tt/2iHSpar > Huge numbers of supermassive black holes are visible in a stunning new photo that astronomers said is the deepest X-ray image of the sky ever captured. http://ift.tt/2hVGpOw http://ift.tt/eA8V8J http://ift.tt/2hX9VTV

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