| The astronomers speculate that quasars were ignited as blackholes grew by swallowing large quantities of cold, dense gas. |
| Astronomers believe that quasars are galaxies with very massive black holes in the center. |
| The brilliant beacons whose radiation streams out of faraway galaxies are known as quasars. |
| In order to be visible at all at the huge distances implied by their redshifts, quasars must produce prodigious amounts of energy. |
| I read up on interstellar objects and astrophysics and studied quasars, pulsars and supernovas, but my main focus was black holes. |
| Here, you'll find everything from black holes to quasars and moon rockets to space stations. |
