A quasar observed roughly 12 billion years ago is consuming matter at about 13 times the rate that physics says should be ...

A quasar from the universe’s first 850 million years has started to look less like a distant pinprick and more like a real ...

(Phys.org) —Like our Milky Way, every known large galaxy has at its center a supermassive black hole, some of which are surrounded by a super-bright disk of hot gas called a quasar—but now a research ...

Quasars initially confused astronomers when they were discovered. First identified as sources of radio-frequency radiation, later observations showed that the objects had optical counterparts that ...