DECam's specialized filter allowed the team to count the number of companion galaxies around the quasar by detecting a very specific type of light they emit, known as Lyman-alpha radiation.

The DESI experiment shocked cosmologists with a hint that dark energy varies over time. Now, with more data, the conclusions hold up.

Astronomers have reached deeper into the heart of a brilliant cosmic engine than ever before, using NASA’s Hubble Space ...

Among the millions of galaxies that Euclid has documented are a suite of far-flung quasars, galaxies whose ... the light from that distant galaxy is warped around the foreground galaxy, as if ...

Hubble dimmed quasar 3C 273’s glare to reveal ghostly blobs and filaments near its core—evidence of galaxy cannibalism and ...

At present, the evidence in favor of evolving dark energy has not met the "5 sigma" statistical threshold for a discovery—and falls around ... line galaxies (blue) and quasars (green).

Quasar J0742+2704 (center) became the subject of astronomers' interest after it was discovered to have a newborn jet blasting from the disk around its ... with other galaxies are what funnel ...

Active black holes have a pancake-shaped structure around them called an accretion disk, which contains hot, electrically charged gas. The plasma that makes up the accretion disk comes from farther ...

Now, astronomers led by researchers from the University of Innsbruck have peered between the billions of stars, galaxies and supermassive black hole-powered quasars ... a galaxy. Around 4% of ...

The Dark Energy Spectroscopic Instrument used millions of galaxies and quasars to build the largest ... 900 researchers from over 70 institutions around the world and is managed by the U.S ...

and chaos in the space around these black holes. Over time, it became clear that quasars weren’t just isolated beacons—they were deeply connected to their host galaxies and the universe’s ...