The black hole inside RX J1131 was the first to have its spin measured
RX J1131 is a distant supermassive black hole containing quasar located about 6 billion light years from Earth in the constellation Crater. In 2014, astronomers found that the X-rays being emitted are coming from a region inside the accretion disk located about three times the radius of the event horizon. This implies that the black hole […]