IRVINE, Calif., May 22 (UPI) -- Two colliding galaxies have formed a fragile mega-galaxy, a short-lived phenomenon U.S. astronomers are calling a cosmic "missing link."
Two young galaxies that collided 11 billion years ago rapidly formed a massive galaxy about 10 times the size of the Milky Way, University of California, Irvine, postdoctoral researcher Hai Fu says.