Black Holes

In the last couple of decades black holes have turned from a very beautiful but equally abstract (mostly) theoretical concept to an object generally believed to constitute a very distinctive and important part of the observed Universe. On the other hand, study of black holes lies at the junction of General Relativity and quantum world, and led us to the holographic principle. This makes them a common area to a very wide field of research, including classical and quantum gravity, cosmology and astrophysics.