This image shows a 30,000 light-year region from the Renaissance Simulation, centered on a cluster of young galaxies that generate radiation (white) and metals (green) while heating the surrounding gas. A dark matter halo just outside this heated region forms three supermassive stars (inset), each one over 1,000 times the mass of our Sun. The stars will quickly collapse into massive black holes, and eventually supermassive black holes, over billions of years. - Image Credit: Advanced Visualization Lab, National Center for Supercomputing Applications.