Sir Arthur Stanley Eddington
Eddington, Sir Arthur Stanley (1882–1944), English astronomer and physicist. He conducted significant research on the interiors of stars—how they transmit light and heat and how the mass of a star is related to its luminosity. Eddington supported the theory of relativity early on when he found that light rays are bent in a gravitational field. He wrote The Internal Constitution of the Stars (1926) and The Expanding Universe (1933).