Photo Illustration by Kelly Caminero / The Daily Beast / GettyThings are about to change in a supermassive way in the world of astrophysics. An international team of scientists have discovered evidence for a new type of signal they have long searched for—one that will give us a greater understanding into black holes, and the origins of galaxies and the universe as we know it.The team, coordinated by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), announced Wednesday