black hole add round 12

A new supercomputer model could help astronomers see the hard-to-see merger of two supermassive black holes, each one millions to billions of times the mass of our Sun. Watch & learn more new details about the revealing computer simulation that took 46 days on 9,600 computing cores to produce: https://go.nasa.gov/2E1z5kT | NASA - National Aeronautics and Space Administration