Mary Calvert, US astronomer

Mary Calvert, US astronomer

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Caption: Mary R. Calvert (1884-1974), US astronomer, making observations with the 12-inch refractor telescope at the Yerkes Observatory, Williams Bay, Wisconsin, USA. This telescope was originally from the Kenwood Observatory in Chicago. Calvert started work at the Yerkes Observatory in 1905, and worked there until her retirement in 1946. Like other women at the time, she started out as an astronomical computer (person performing mathematical calculations) and astrophotographer. Calvert was co-editor of E. E. Barnard's 'A Photographic Atlas of Selected Regions of the Milky Way' (1927). Photographed on 23 February 1926.

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