Space.com
By
January 1, 2023
Supernovas are bad news. They can wreck biospheres and flood planets with deadly radiation. And now, a recent study has added a new potential threat: a special type of supernova that can destroy a planet’s ozone layer years after the initial explosion.
When giant stars die in massive explosions called supernovas, they temporarily become some of the most luminous objects in the universe. A single supernova can outshine the combined light of hundreds of billions of stars.