Crommelin took part over his career in numerous expeditions throughout the world to study solar eclipses . In 1919 he participated in the solar eclipse expedition to the city of Sobral , in Brazil , which aimed to determine the amount of the deflection of light caused by the gravitational field of the Sun . The results from these observations were crucial in providing confirmation of the General Theory of Relativity , which Albert Einstein had proposed in 1916
1919 he participated in the solar eclipse
Solar eclipse of May 29, 1919
Andrew Claude de la Cherois Crommelin