Astronomers have been using gravitational waves to detect merging black holes for years now, but may have to rely on pulsars – rapidly spinning neutron stars – to observe the mergers of supermassive black holes. When black holes merge, they release enormous amounts of energy in the form of ripples in the fabric of spacetime. … Continue reading "Astronomers Might use Pulsars to First Detect Merging Supermassive Black Holes"