New class of black holes discovered

A new class of black hole, more than 500 times the mass of the Sun, has been discovered by an international team of astronomers.

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<p><a href="http://www.physorg.com/news165675129.html">New class of black holes discovered</a></p> <p>A new class of black hole, more than 500 times the mass of the Sun, has been discovered by an international team of astronomers.</p>