Black Holes (BHs) are the standard-bearers of cool Physics. Pop culture is full of references to these objects that are so powerful that nothing can escape them. A lot of Physicists have spent their lives thinking about how BHs are formed, how they can be detected and what happens to objects that enter a BH.

In this module, we will get introduced to the idea behind a black hole. When we say that black holes are very powerful, what does that exactly mean? How do they differ from other powerful objects? In the next module, we will see how these things actually form and how we detect them.