New insight into why galaxies stop forming stars

New insight into why galaxies stop forming stars 2

Galaxy clusters are rare regions of the universe consisting of hundreds of galaxies containing trillions of stars. It has long been known that when a galaxy falls into a cluster, star formation is fairly rapidly shut off in a process known as ‘quenching.’ A new study has made the best measurement yet of the quenching timescale, measuring how it varies across 70 percent of the history of the universe. https://www.sciencedaily.com/releases/2018/10/181023185443.htm