Using Pulsars to Measure Gravity Waves. By Rene Breton from the University of Manchester, also Head of Research: Department of Physics and Astronomy, Professor of Astrophysics: Jodrell Bank Centre for Astrophysics. Pulsars are dense remnants of dead stars that regularly emit beams of radio waves, which is why some call them cosmic lighthouses. Because their rapid pulse of radio emission is so predictable, a large array of well-understood pulsars can be used to measure extremely subtle abnormalities, such as gravitational waves. Guests welcome.