1. By Jan Haas

2. Overview 1. Gravitation as a wave 2. Weber bars 3. Laser interferometers 4. LISA

8.  loss of energy  the neutron-stars draw nearer  the time of circulation shortens  the frequence raises  the loss of energy increases  the process builds itself up Gravitational waves emited by two rotating neutron-stars

16. Nautilis-detektor located at the L.N.F. (Laboratori Nazionali di Frascati) of I.N.F.N. (Istituto Nazionale di Fisica Nucleare), Italy

22. Aerial view of GEO600 The tube in the trench Credit: Albert Einstein Institute Hannover

23. The GEO600 Movie (Video without sound)