A newly discovered way to determine the spin of supermassive black holes could help shed light on the evolution of these bizarre objects and the galaxies they anchor. Astronomers used a European spacecraft to estimate one black hole's rotation rate.
via LiveScience.com http://www.livescience.com/38536-giant-black-hole-spin-galaxy-growth.html
via LiveScience.com http://www.livescience.com/38536-giant-black-hole-spin-galaxy-growth.html
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