Near the Milky Way’s core, NASA’s Chandra spotted an X-ray blob too bright to easily explain — over ten times brighter than massive young star clusters — and astronomers think it may be the still-expanding wreckage of a supernova that exploded around 300 AD.

NASA's Chandra and ESA's XMM-Newton point to a possible supernova remnant in Sagittarius C, near the galactic centre. New analysis of archival data, published in The Astrophysical Journal, suggests an explosion at least 1,700 years ago, though it remains a candidate. The post Near the Milky Way’s core, NASA’s Chandra spotted an X-ray blob too bright to easily explain — over ten times brighter than massive young star clusters — and astronomers think it may be the still-expanding wreckage of a sup