Black holes

At the centre of every galaxy lie the strangest objects in the universe: black holes. They possess such immense density and gravity that no matter, not even light, can escape their grasp. Stars orbiting their edge release energy in the form of light until they cross the event horizon and disappear forever. Black holes are thus at the centre of current physics research, and this book summarises how they form and why they confirm that Einstein's theory of general relativity is a brilliant description of the universe around us.