About Black Holes And Wormholes

Since Chronosia has a wormhole in the story, I think it would be great if we discuss this fascinating topic. Can we find these exotic things in the real universe?

Can a collapsed star really keep light from escaping? Could we use it to travel to another place in the universe or even a backward time universe?

Before we get an idea of how to answer the above we have to answer a few basic questions. What are stars and how do they function? What is light and what are the rules that govern its behavior? For a long time simple answers to these puzzles were maddeningly elusive because their answers involved so many disciplines of science and mathematics. Let us start with a basic question.