Annie Jump Cannon, astronomer
Dec. 11, 1863-Apr. 13, 1941
How We Are Smart by W. Nikola-Lisa, illustrated by Sean Qualls (Lee & Low Books, 2006)
Cannon was an astronomer and curator of photographs at Harvard Observatory. She was the person responsible for organizing stars into types (O, B, A, F, G, K, M), a classification that is still in use today.
Click on over to the Annie Jump Cannon Homepage at Wellesley.edu.