Each distorted multiple image of the quasar represents a different path taken by light through the dimpled space-time surrounding the lens, and some of those paths are longer than others.
In essence the galaxy is eclipsing the quasar , but paradoxically its gravitational lens effect brightens the light received from the latter.
At those rates, each galaxy could easily have formed the quasar and its black hole power source in just a few hundred million years.
Meanwhile, optical measurements suggest the quasar is a billion times more massive than our sun.
A powerful young galaxy caught at the edge of the visible universe, a quasar emits the light of tens of normal galaxies, with most of that energy believed to be generated by a supermassive black hole in the quasar 's center.
Now, of course, I knew that most astronomers think a quasar is a black hole with matter falling into it from an accretion disk, and that for some reason it is ejecting charged particles along its magnetic poles.
The fortuitous alignment of a quasar and a distant galaxy has enabled astronomers to unravel the origin and evolution of chemical elements
Radio astronomers found pulsars, quasars , and massive molecular clouds dotting the celestial landscape.
The astronomers speculate that quasars were ignited as blackholes grew by swallowing large quantities of cold, dense gas.
Because all these galaxies, quasars included, have active galactic nuclei, they're called AGNs.