This is the first time such an effect, known as precession, has been seen in black holes, where the twisting is 10 billion times faster than in previous observations. This artist’s conception shows two supermassive black holes, similar to those observed by Bansal et al, orbiting one another more than 750 million light years from Earth. Image credit: Josh Valenzuela, University of New Mexico. The binary black hole in question was detected through...
