Hardly worth a thread, but here it is.
“At left, the quasar SDSS J165202.64+172852.3 is highlighted in a Hubble Space Telescope image taken in visible and near-infrared light. The images on the right and at bottom present new observations from the James Webb Space Telescope in multiple wavelengths. They demonstrate the distribution and motions of gas within a newly observed galaxy cluster around the central quasar.”
“Previous studies by NASA’s Hubble Space Telescope and other observatories called attention to the quasar’s powerful outflows, and astronomers had speculated that its host galaxy could be merging with some unseen partner. But the team was not expecting Webb’s NIRSpec data to clearly indicate it was not just one galaxy, but at least three more swirling around it. Thanks to spectra over a broad area, the motions of all this surrounding material could be mapped, resulting in the conclusion that the red quasar was in fact part of a dense knot of galaxy formation. There are few galaxy protoclusters known at this early time. It’s hard to find them, and very few have had time to form since the big bang.”
“The three confirmed galaxies are orbiting each other at incredibly high speeds, an indication that a great deal of mass is present. When combined with how closely they are packed into the region around this quasar, the team believes this marks one of the densest known areas of galaxy formation in the early universe. Even a dense knot of dark matter isn’t sufficient to explain it. We think we could be seeing a region where two massive halos of dark matter are merging together.”