Post-starburst galaxy 0570

Post-starburst galaxies were previously believed to expel all of their molecular gas, a behavior that caused them to stop forming stars. New observations have revealed that these galaxies actually hold onto and condense star-forming fuel near their centers and then don't use it to form stars. Here, radio data of PSB 0570.537.52266 overlaid on optical images from the Hubble Space Telescope show the dense collection of gas near the galaxy's center. Credit: ALMA (ESO/NAOJ/NRAO) / S. Dagnello (NRAO/AUI/NSF)