View Full Version : Supermassive Black Hole’s Dizzying Spin Is Half The Speed Of Light

2014-Mar-05, 06:20 PM
The spin rate of a supermassive black hole has been measured for the first time, and wow, is it fast. X-ray observations of**RX J1131-1231 (RX J1131 for short) show it is whizzing around at almost half the speed of light. Through X-rays, the astronomers were able to peer at the rate of debris fall into […]

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