Professor Avishay Gal-Yam and colleagues at Israel’s Weizmann Institute have just published their findings of their 2019 discovery of a supernova that had never been observed before. A Wolf-Rayet Star exploded nearly 1 billion light years from Earth, emitting cosmic radiation and heavy elements.
https://wis-wander.weizmann.ac.il/space-physics/going-out-bang