Smithsonian Astrophysical Observatory

Fred Lawrence Whipple Observatory
Fred Lawrence Whipple Observatory
Smithsonian Astrophysical Observatory, South Yard
Smithsonian Astrophysical Observatory, South Yard
Harvard-Smithsonian Center for Astrophysics
Harvard-Smithsonian Center for Astrophysics
Corbitt, Whipple & Udall at Mt. Hopkins Observatory
Corbitt, Whipple & Udall at Mt. Hopkins Observatory

Astrophysical Observatory in South Yard Established on March 1, 1890 by Secretary Samuel P. Langley, the Smithsonian Astrophysical Observatory was one of the earliest to practice the "new astronomy," or astrophysics. Originally housed in a shed behind the Smithsonian Institution Building, the Castle, the observatory initially focused its research on the study of solar radiation and the solar constant—the amount of energy from the sun that strikes the outer edge of the earth's atmosphere. Langley was director of the Astrophysical Observatory until his death in 1906.

Jai Singh's Observatory, Jaipur, India Laboratory of Division of Radiation and Organisms, SIB Charles G. Abbot, who came to the observatory in 1895 as an assistant, was appointed director in 1907. Under Abbot's direction, several solar observing stations were established in the United States, South America, and Africa to carry out research on solar radiation. In 1929, then-Secretary Abbot established the Division of Radiation and Organisms to work with the Smithsonian Astrophysical Observatory on investigating the effects of radiation upon living organisms, mainly plants.

Harvard-Smithsonian Center for Astrophysics In 1955, the Smithsonian and Harvard University joined in an agreement to conduct astrophysical research, and the scientific headquarters of the Smithsonian Astrophysical Observatory moved to Cambridge, Massachusetts. Fred Lawrence Whipple, chairman of the Astronomy Department at Harvard, was named director, replacing director Loyal B. Aldrich, who retired. The move to Cambridge and a close alliance with the Harvard College Observatory generated an expansion of the Astrophysical Observatory’s research program.

Smithsonian Indian Field Station (SAO) Observatory staff were the first scientists able to locate and track the Soviet satellite Sputnik when it was launched in 1957. In the following years, contributions to the national space program were made by optical tracking of satellites at the observatory’s stations around the world. Orbiting astronomical observatory experiments, meteoritical and cometary studies, and theoretical astrophysics investigations were also undertaken.

Fred Lawrence Whipple, by Cornell, James, 1982, Smithsonian Archives - History Div, 2002-32272. A major Smithsonian Astrophysical Observatory facility located at Mount Hopkins, Arizona, was opened in 1968. The Multiple-Mirror Telescope, a joint project of the observatory and the University of Arizona, was dedicated at Mount Hopkins in 1979. The Mount Hopkins Observatory was renamed the Fred Lawrence Whipple Observatory in 1981.

Oakridge Observatory In 1973, the Smithsonian and Harvard University established the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, to coordinate the related research activities of the Smithsonian Astrophysical Observatory and the Harvard College Observatory under a single director. The consolidated Center for Astrophysics research program was organized into seven divisions: Atomic and Molecular Physics; High Energy Astrophysics; Optical and Infrared Astronomy; Planetary Sciences; Radio and Geoastronomy; Solar and Stellar Physics; and Theoretical Astrophysics. Major Smithsonian Astrophysical Observatory studies in hydrogen masers, submillimeter wavelength interferometers, and infrared telescopes were undertaken in the 1970s and 1980s. On November 22, 2003, the Smithsonian Astrophysical Observatory dedicated the Submillimeter Array atop Mauna Kea, Hawaii. The Submillimeter Array explores the universe by detecting light of colors which are not visible to the human eye, furthering the observation programs first established by Samuel Langley in 1890.

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Today in Smithsonian History

Tom Crouch at "A More Perfect Union" Exhibit

October 1, 1987

A More Perfect Union: Japanese Americans and the United States Constitution opens at the National Museum of American History. The exhibition is designed to focus attention on the Bicentennial of the Constitution and explores a period when racial prejudice and fear upset the balance between the rights of citizens and the power of the state and led to the internment of some 120,000 Japanese Americans for much of World War II. The exhibition also includes a section on the men in the 100th Battalion/442nd Regimental Combat Team, an all-Japanese American unit of the U.S. Army.More

Did you know...

That Smithsonian Secretary and astrophysicist Charles Greeley Abbot began developing solar equipment, such as solar cookers, in the 1920s?

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