"As we look out into the universe and identify the many accidents of physics and astronomy that have worked to our benefit, it almost seems as if the Universe must in some sense have known that we were coming." -Freeman Dyson
A black hole is a super-massive object left behind after the death of stars, from which nothing NOT EVEN LIGHT can escape. This hole has so much gravity that it draws everything around it in the center of the black hole. Including stars and planets.