Einstein's "general theory of relativity", the modern description of gravity, is his greatest legacy. It predicts the bending of light as it passes by the sun, and the collapse of stars into black holes. Another dramatic predictions is that rapidly accelerating massive objects produce ‘waves of gravitation’ that propagate through space at the speed of light. In the coming few years, a new generation of large ‘gravitational wave observatories’ promises to make the first direct detections of these waves. This will usher in a new way to ‘see' the universe and a new era in astronomy and astrophysics.
This lecture is part of AEI-ICTS joint workshop on gravitational-wave astronomy