black holes

Black holes are made when a super massive star dies in a super novae. When that happens and the gravity gets to dense it creates a swirling effect which creates a black hole. Sometimes two black holes wander too close and they start to orbit each other. Then they start to speed up and and they get faster and faster until one sucks up the other. The black hole that won gets bigger then if that keeps sucking up other one it could become a super massive black hole. That is how a black hole is made.