This collection consists of the professional papers of American astronomer Alfred Harrison Joy (1882-1973) and contains correspondence and research files related to Joy's study of stellar radial velocities, variable stars, T Tauri stars, and galactic structure. There is also an extensive amount of material related to Joy's involvement with the American Astronomical Society and the Astronomical Society of the Pacific in the collection.

Alfred Harrison Joy was a distinguished stellar astronomer who spent most of his professional career at the Mount Wilson Observatory. His work on stellar radial velocities, variable stars, and galactic structure in the early twentieth century laid the groundwork for the rapidly expanding field of astrophysics. His pioneering work, his long tenure at Mount Wilson, his central roles in the Astronomical Society of the Pacific and American Astronomical Society, and his position as Secretary of the Observatory make him a significant figure in the history of astronomy.

Approximately 2,150 items in 10 boxes

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