A team of astrophysicists led by Dr Rubens Reis from the University of Michigan has directly measured the spin of a supermassive black hole in a quasar named RX J1131-1231, located 6 billion light years away from Earth. Multiple images of the quasar RX J1131-1231 are visible in this data from Chandra and Hubble. Image credit: X-ray – NASA / CXC / University of Michigan / R.C. Reis et al; optical – NASA / STScI. Gravitational lensing by an...
