In 1939, Chandrasekhar finished his theory of white dwarfs which was quickly praised by Bengt Strömgren and Paul Ledoux. The latter said in his introductory book of astronomy that Chandrasekhar's theory deserved to be compared to the works of Eddington, Jeans and Svein Rosseland. In a conference in Paris in the same year, was the first time that Chandrasekhar openly said that Eddington theory was wrong.