How are black holes supernovas and black holes form?

Answer:
Supernova happens when a star that is at least 3 times larger than our sun dies, it will be crush by its own gravity. Then boom, supernova. Then the star acts like a sponge, it will get bigger. That star is not a star anymore, it is a black hole.
First answer by Missachuu. Last edit by Missachuu. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 0 [recommend question].