Stars are thought to form within enormous filaments of molecular gas. Regions where one or more of these filaments meet, known as hubs, are where massive stars form.

These massive stars, located nearby, would have put the early Solar System at risk of a powerful supernova. This risk is more than just hypothetical; a research team at the National Astronomical Observatory of Japan, led by astrophysicist Doris Arzoumanian, looked at isotopes found in ancient meteorites, finding possible evidence of a massive star’s turbulent death…