| That unexpectedly collapses it into a black hole, a supermassive region with a gravitational pull so strong not even light can escape. |
| The observable Universe contains around 100 billion large galaxies and a comparable number of supermassive black holes. |
| Researchers conclude that the existence of winged radio galaxies proves that supermassive black holes collide. |
| Although astronomers are surprised to find a blue disk of stars swirling around a supermassive black hole, they also say the puzzling architecture may not be that unusual. |
| But others, such as the Milky Way, would still have formed a supermassive black hole despite never being a quasar. |
| A more exotic model posits the existence of small black holes not far from the supermassive one at the galactic center. |
