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Wednesday, November 11, 2009 |
Wednesday, November 11, 2009 |
Photo: "Sleeping" Black Hole Briefly Awoke in 1700sThese light echoes (circled above) were caused by x-ray output from the Milky Way's once-active, but now slumbering, supermassive black hole. Images courtesy ASCA and Suzaku: JAXA; Chandra: NASA/CXC; XMM-Newton: ESA
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY |
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