Astronomers find cosmic double whammy The two clusters are both very massive, each weighing about a quadrillion or a billion times the mass of the Sun. By combining data from several telescopes around the world including India's Giant Metrewave Radio Telescope (GMRT) in Pune, astronomers have discovered a cosmic double whammy unlike any ever seen before. Two of the most powerful phenomena in the Universe, a supermassive black hole, and the collision of giant galaxy clusters, have combine