[Image: Hypatia by Charles William Mitchell, 1885]
I knew she was a mathematician but I didn't realize that she was also a skilled astronomer and actually collaborated with her father, Theon, on several treatises.
"It is thought that Book III of Theon’s version of Ptolemy’s Almagest—the treatise that established the Earth-centric model for the universe that wouldn’t be overturned until the time of Copernicus and Galileo—was actually the work of Hypatia." - Hypatia, Ancient Alexandria's Great Female Scholar, Smithsonian.com
[Image: Front of an astrolabe created by Frenchman Jean Fusoris. Photo courtesy of the Adler Planetarium and Astronomy Museum , Chicago, IL. The Adler Planetarium houses the largest collection of astrolabes in North America]