The Harvard College Observatory (HCO) is located in Cambridge,Massachusetts.
 

Welcome to the home page of the Harvard College Observatory (HCO). Founded in 1839, the HCO carries on a broad program of research in astronomy and astrophysics, collaborating with the Smithsonian Astrophysical Observatory (SAO) at the Harvard-Smithsonian Center for Astrophysics (CfA) and providing substantial support to Harvard's Department of Astronomy.

More information is available for: HCO Administrative Office CfA Director's Office John Wolbach Library Model Shop Photographic Plate Collection Science Education Department 9" Clark Telescope The Great Refractor Public Open Nights Harvard University Department of Astronomy