NASA’s Fermi Mission Uncovers Possible Sibling Supernova Remnants

https://science.nasa.gov/missions/fermi/nasas-fermi-sibling-supernova-remnants/?utm_source=newsletter&utm_medium=email&utm_campaign=nn202624 A new study of two supernova remnants, the debris left behind after stars explode, suggests the blasts came from stellar siblings that once orbited each other. The first star’s detonation sent its binary companion hurtling through space, and then, after traveling for thousands of years, the surviving star also detonated. The study focuses on a faint supernova remnant called G189.6+3.3, visible mainly in X‑rays. It sits next to the brighter and better‑known Jellyfish Nebula, and the two remnants appear to overlap. Recent X‑ray observations suggest hot plasma likely associated with G189.6+3.3 may extend across the entire region, hinting that the overlap may be nearly total.