A new way to weigh giant black holes

How do you weigh the biggest black holes in the universe? One answer now comes from a completely new and independent technique that astronomers have developed using data from NASA's Chandra X-ray Observatory.

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<p><a href="http://www.physorg.com/news135432769.html">A new way to weigh giant black holes</a></p> <p>How do you weigh the biggest black holes in the universe? One answer now comes from a completely new and independent technique that astronomers have developed using data from NASA's Chandra X-ray Observatory.</p>