Scientists pioneer technique for 'weighing' black holes

Two astrophysicists at NASA's Goddard Space Flight Center in Greenbelt, Md., Nikolai Shaposhnikov and Lev Titarchuk, have successfully tested a new method for determining the masses of black holes.

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<p><a href="http://www.physorg.com/news98539765.html">Scientists pioneer technique for 'weighing' black holes</a></p> <p>Two astrophysicists at NASA's Goddard Space Flight Center in Greenbelt, Md., Nikolai Shaposhnikov and Lev Titarchuk, have successfully tested a new method for determining the masses of black holes.</p>