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.
Blown into Being: How a Nearby Supernova Sculpted Our Interstellar Neighborhood
Zucker et al. investigate the origin of the Cluster of Local Interstellar Clouds and find that a nearby supernova about 1.2 million years ago likely created them by sweeping up gas inside the Local Bubble. They rule out a purely Strömgren sphere origin and show that their model explains the clouds’ motion, structure, and formation history.