1: What Are Black Holes?
A black hole is a region of spacetime from which it is not possible to communicate with “infinity”.
Black holes are a possible endpoint of stellar evolution.
Black holes are predictions of Einstein's theory. They are vacuum solutions to the Einstein field equations.
Black holes contain curvature singularities contained within causal boundaries.
- Cause computational problems in modeling them.
- Can excise the interior of black holes to model them.