Scientists using the JWST and ALMA discovered that a sonic boom several times the size of the Milky Way has kickstarted a recycling plant for warm and cold molecular hydrogen gas in Stephan’s Quintet, which is 270 million light-years from Earth in the constellation Pegasus. 2/🧵 pic.twitter.com/HXCQNXAy7n

— National Radio Astronomy Observatory | NRAO (@TheNRAO) January 9, 2023