Add Yahoo as a preferred source to see more of our stories on Google. Astronomers have witnessed a cosmic explosion that emitted as much energy as 400 billion suns. The event, which has been nicknamed ...

The universe produces explosions so powerful they briefly outshine entire galaxies. Events like gamma ray bursts neutron star ...

Add Yahoo as a preferred source to see more of our stories on Google. The final stage of a superkilonova. (Caltech/K. Miller and R. Hurt (IPAC)) Astronomers may have discovered a never-before-seen ...

A strange cosmic blast that lit up the sky in two distinct acts is forcing astronomers to rethink how stars live and die. The event, tagged AT2025ulz, appears to be the first known case where a ...

Scientists may have to rethink their playbook for studying gamma-ray bursts, the most powerful known cosmic explosions, after a blast detected in July set a new record by firing energetic jets for ...

Astronomers may have discovered a never-before-seen cosmic explosion that effectively combines a supernova with a kilonova—the blast that results when two dead, dense stars collide. When massive stars ...