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NASA's Jet Propulsion Laboratory News and Features

NASA's NuSTAR Helps Solve Riddle of Black Hole Spin

27 Feb 2013, 19:11 UTC
NASA's NuSTAR Helps Solve Riddle of Black Hole Spin

Two X-ray space observatories have measured definitively, for the first time, the spin rate of a black hole with a mass 2 million times that of our sun.

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