Stellar explosion in 1054 C.E. may have been a third flavor of supernova

Astronomers have found convincing evidence that supernovae come in a third flavor, powered by a long-suspected explosive mechanism that may explain a bright supernova humans observed 1,000 ago and that birthed the beautiful Crab Nebula.The evidence is an exploding star observed in 2018, the first that fits all six criteria for a hypothesized type of supernova called an electron-capture supernova.

More here https://news.berkeley.edu/story_jump/stellar-explosion-in-1054-c-e-may-have-been-a-third-flavor-of-supernova/