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.

A new University of Kansas survey of distant galaxies using the James Webb Space Telescope reveals never-before-seen star ...

The halo is more extended that astronomers originally thought, and contains enough hydrogen gas to resolve the problem of the ...

The school-bus-sized observatory launched on April 24, 1990 and overcame early setbacks to become one of the most ...

The dwarf galaxies that we see around large galaxies today are the leftovers of this formation process. According to this picture of "hierarchical growth," these dwarf satellite galaxies should be ...

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

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 ...

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 ...

Discover the power of black holes and their jets, and how they impact the formation of stars and potentially habitable worlds.

One of the most powerful objects in the universe is a radio quasar—a spinning black hole ... and how they affect the environment of space around them. Black holes are massive, astrophysical ...

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 ...