When a star eats a black hole, it can create a massive explosion. Astronomers using the Karl G. Jansky Very Large Array (VLA) have studied radio light from a supernova, which shows it may have been triggered by the last meal of a massive star.
Writing and narration provided by Phil Plait @SYFY
Discover more about what can cause a supernova from the original press release:
https://public.nrao.edu/news/stellar-collision-triggers-supernova/