Chandra reviews black hole musical: Epic but off-key

A gigantic sonic boom generated by a supermassive black hole has been found with NASA's Chandra X-ray Observatory, along with evidence for a cacophony of deep sound.

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<p><a href="http://www.physorg.com/news79276947.html">Chandra reviews black hole musical: Epic but off-key</a></p> <p>A gigantic sonic boom generated by a supermassive black hole has been found with NASA's Chandra X-ray Observatory, along with evidence for a cacophony of deep sound.</p>