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Annie Jump Cannon

Annie Jump Cannon is a Delaware historical marker in Dover, Kent County, dedicated 2016.

Kent County · dedicated 2016 · 34 S. State Street, Dover

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Annie Jump Cannon (1863-1941), a prominent astronomer who pioneered stellar classification, observed her first stars from the roof of this house. Cannon, who was legally deaf, graduated valedictorian from Wilmington Conference Academy, now Wesley College, in 1880. She continued her studies at Wellesley College and Radcliffe Women’s College at Harvard. While working at the Harvard Observatory, Cannon developed the Star Spectra system, classifying over 300,000 stars based on color and temperature. She was the first woman to receive an honorary doctorate from Oxford University and her long career paved the way for women in science.

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Barry Lawrence Ruderman Map Collection, Stanford Libraries

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under a mile from where William Gabby lived in the 1760s

what this marker records spans 1777 to 1789, overlapping William Gabby's years here

From one family's 77-marker roster

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Source: State of Delaware Historical Markers Program, administered by the Delaware Public Archives.
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