Two Supermassive Black Holes on Verge of Colliding Spotted by Scientists Ed Browne - 5h ago Follow React 5 Comments | 56 Save for later © solarseven/Getty A stronomers believe they have spotted two colossal black holes orbiting each other that are set to collide in the future—an event so energetic it will shake the fabric of space and time. The discovery was made by scientists observing a quasar, which is the name given to extremely bright cores of galaxies where gas is superheated to millions of degrees by a supermassive black hole. The quasar in question, PKS 2131-021, has been studied extensively with radio observations spanning 45 years. Over time, researchers had noticed that the brightness of PKS 2131-021 would sometimes change. Not only was the light varying periodically, but sinusoidally. In other words, there was a pattern that the researchers could trace. They think the reason for this is that a jet of light from the quasar is moving back and forth like a ...