Ancient quasars seen by the James Webb Space Telescope technically shouldn’t exist, but one rare type of dark matter could make sense of that. Ultra-self-interacting dark matter clumped into ...

A quasar is a type of active galactic nucleus—a galaxy hosting a supermassive black hole that is actively consuming material.

Abstract: Quasars in the Age of Time-Domain Astronomy: Black hole feeding, visible as quasars, is a critical ingredient in many fields from galaxy evolution to multi-messenger gravitational wave ...

The characteristics of these galaxies indicate that the merger will form a monster galaxy, one of the brightest types of objects ... holes in the early universe. Quasars are bright objects powered ...