Henry Norris Russell, American astronomer (died 1957)

Henry Norris Russell

American astronomer (1877–1957)

Henry Norris Russell ForMemRS HFRSE FRAS was an American astronomer who, along with Ejnar Hertzsprung, developed the Hertzsprung–Russell diagram (1910). In 1923, working with Frederick Saunders, he developed Russell–Saunders coupling, which is also known as LS coupling.