Gravitational collapse | Amazon Redshift | Gravitational lens | Gravitational constant | Gravitational acceleration | European Gravitational Observatory | 2dF Galaxy Redshift Survey |
In 1960 Robert Pound carried out together with his assistant Glen Rebka an experiment, the Pound-Rebka experiment, using the Mössbauer effect to measure the gravitational redshift of the radiation from a gamma source in the gravitation field of planet Earth.