History
Harvard College Observatory (HCO)
Founded in 1839, the HCO carries on a broad program of research in astronomy and astrophysics, working in concert with Harvard's Department of Astronomy.
Smithsonian Astrophysical Observatory (SAO)
The Smithsonian Astrophysical Observatory (SAO) was founded in 1890 and began its tenure alongside other Smithsonian units on the Mall in Washington, D.C. In fact, operations were originally in a modest shed behind the Smithsonian Castle.