On September 14th 2015, LIGO (Laser Interferometer Gravitational-Wave Observatory) instruments detected gravitational waves from a binary black hole merger. This was the first ever direct observation of gravitational waves, and came 100 years after their existence was predicted by Einstein.
After half a dozen black hole mergers and one binary neutron star merger, these observations are transforming our understanding of some astrophysical phenomena. In this talk some of the key discoveries and prospects for the future are highlighted.