During his career he studied nebulae, interstellar matter, the night sky and cometary physics.
In 1925, while working in collaboration with Jean Cabannes, he computed the altitude of the Earth's ozone layer.
[1][2] Some of his proteges who worked with him in the observatory included Marie Bloch and Charles Fehrenbach.
[4] His undergrad was completed in 1913 and his Ph.D. in 1928 under Charles Fabry and Jean Cabannes.
[5] He was awarded the Valz Prize by the French Academy of Sciences in 1932 for his work on astronomical photometry.