"Discovery of Dual Quasar Sheds Light on Black Hole Collision in Galaxy Merger"
Astronomers have discovered a pair of quasars in a disk-disk galaxy merger at a redshift of 2.17, making it one of the closest quasar pairs ever found. The discovery was made using data from the Hubble Space Telescope, Chandra X-ray Observatory, and other telescopes. The quasar pair is believed to be a binary system, rather than a gravitational lens, and could provide insights into the co-evolution of supermassive black holes and their host galaxies.