| It's already found hundreds of massive black holes known as blazars and has imaged the coldest known stars in the universe. |
| Astrophysicist Marco Ajello of Stanford and his colleagues used the orbiting Fermi Large Area Telescope to study distant blazars, a type of bright, active galaxy. |
| Since its 1991 launch aboard a shuttle, the Compton Observatory has detected 50 blazars. |
| The extreme brightness and variability of blazars result from a chance orientation that brings one jet almost directly in line with Earth. |
| The fastest ' things' i n the Universe are blobs of superheated plasma that are ejected from black holes that are in the cores of extremely active galaxies known as blazars. |
| These blazars emit gamma rays, but not all of them reach Earth. |
