Rapid changes in the periods of certain eclipsing binary stars were found that corresponded to sudden bursts of gravitational radiation.
Local distortions in arrays of parallel metal bars were observed with frequencies that matched general relativistic calculations.
Stars in closely spaced clusters were observed to oscillate back and forth with wavelengths that were predicted by general relativity.
Slow spin-up of the period of pulsars in binary-star systems was detected due to the infall of material from a nearby binary companion onto the rotating neutron star.
Slow, steady decreases were detected in the orbital rates of pulsars that orbit as members of closely spaced binary-star systems.