How Supernova Explosions May Have Stopped Star Formation Near the Sun

Leonard Romano’s study revises the history of the Local Bubble, finding it to be only 3.5–5.5 million years old and powered by about 19–30 supernovae, not 14 million years and fewer explosions as once thought. Using 3D dust maps and simulations, the work shows the bubble’s rapid expansion likely quenched star formation near the Sun, challenging earlier claims that it triggered new stars.