In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

She worked at the Harvard College Observatory as a “human computer,” laboriously measuring the positions and brightness of thousands of stars on photographic plates. She was particularly ...

Founded in 1947 under the International Astronomical Union, it operates at the Center for Astrophysics, a research institute jointly operated by the Harvard College Observatory and Smithsonian ...

Leavitt worked at Harvard College Observatory as a "computer" who would analyze photographic plates taken by Harvard's telescopes. In particular, Leavitt would scrutinize images of the Small and ...

It consists of the Harvard College Observatory and the Smithsonian Astrophysical Observatory. The center's main facility is located between Concord Avenue and Garden Street, with its mailing ...