Elizabeth Langdon Williams

Elizabeth Langdon Williams (February 8, 1879 in Putnam, Connecticut – 1981) was an American astronomer. She graduated from MIT in physics in 1903 as one of their earliest female graduates, and was hired by Percival Lowell to help find Planet X. She was the head human computer for Lowell in 1915, when her calculations led to the first captured image of Pluto, but she left the observatory before 1930 when Clyde Tombaugh finally realized the significance of this image. In 1922, she married another astronomer, George Hall Hamilton.