https://www.sciencenews.org/article/cosmic-pas-de-trois-triple-quasar-system-may-signal-galaxy-mergers
A Cosmic Pas de Trois: Triple-quasar system may signal galaxy mergers
Jun 12, 2023 - Astronomers have discovered the first example of a trio of quasars, the brilliant beacons of light that seem to be fueled by supermassive black holes at the...
pas de troistriple quasar