On Saturday, September 30, 2023, the Max Planck Institute for Gravitational Physics (Albert Einstein Institute) and the Institute for Gravitational Physics of Leibniz Universität Hannover invite you to visit the German-British gravitational-wave detector GEO600 near Sarstedt. Between 12:00 and 16:00 CEST, all visitors can speak with researchers at the detector site about the current state of gravitational-wave astronomy, the crucial contributions of GEO600 as a think tank of international research, and visit the detector. [more]