A quasar 3.4 billion light-years away is stirring hot gas across roughly 300,000 light-years, far beyond the galaxy that contains it. XRISM detected unusually fast gas motions carrying about 100 times more energy than earlier estimates for similar black-hole winds. The observations may help astronomers improve models of how black holes influence galaxy clusters, though turbulence, gas flows and sloshing remain difficult to separate. A quasar 3.4 billion light-years away is stirring hot gas far beyond its home galaxy, sending energy through a region 300,000 light-years wide. The disturbance is forcing astronomers to rethink how far black-hole winds can reach. The source is H1821+643, a bright quasar in the constellation Draco. At its center sits a supermassive black hole about 2.6 billion times the mass of the sun. It shines far more powerfully than most nearby quasars despite weak radio jets. “Black holes are largely known for sucking matter in, but they also eject gas in the form of powerful winds,” said Satoshi Yamada, an assistant professor at Tohoku University’s Frontier Institute for Interdisciplinary Sciences. …