# Leibniz MMS Days 2020 - Key Note Lecture

**Pfeiffer, Harald**

*Binary black hole coalescence: From numerical relativity to gravitational waves*

Several times per hour, a pair of black holes coalesces somewhere in the observable Universe. Direct supercomputer calculations of binary black holes elucidate the dynamics of warped space-time and underpin gravitational wave observations of these systems. This talk introduces the techniques of such simulations and their application to gravitational wave astronomy. We summarize current observational results and future challenges.