The life of Arthur Stanley Eddington

argument Arthur Stanley Eddington astrophysics atoms British Association Cambridge Cepheid Cepheid variables chapter College constant cosmical criticism density developed Dirac E-numbers eclipse Eddington replied Eddington wrote Einstein equation expanding universe experience formula Fundamental Theory galaxies gave geometry giant stars gravitation Greenwich hydrogen hypothesis ideas interest investigation ionisation Jeans Jeans's knowledge later laws lectures Lemaitre letter mass mathematical matter measure meeting Milne mind motions Mt Wilson mystic nature nebulae observations Observatory paper particles Pathways in Science perfect gas philosophy physical science Physical World physicists present problem Proc proper motions protons Protons and Electrons pulsation quantum theory radiation pressure radiative equilibrium realised recognised relativity theory remarkable Royal Astronomical Society Royal Society scientific scientists space spirit stellar evolution stellar system Swarthmore Lecture temperature theoretical Theory of Protons theory of relativity thought tion tribute Trinity velocity wave white dwarf