Posts Tagged ‘black holes’

Primordial black hole search called off

January 21, 2014 Leave a comment

A new analysis rules out the remaining mass window of primordial black holes as candidates to explain dark matter, I reported for Nature on Friday.

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How fast do black holes spin?

August 7, 2013 Leave a comment

Astronomers have measurements of the rotation rate of more than 20 supermassive black holes. Here’s a report on one more.

Categories: Astronomy, Astrophysics Tags: