Hipparchus was one of the first mathematicians who trigonometrically defined his astronomical observations through stereographic projection …
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If you are interested in learning more about the astrolabe, as well as how to make one, here are several links that will point you in the right direction. (pun intended)
There is a paper on Academia that I posted years ago, proudly claiming that Hypatia was the world’s first female mathematician. It’s humbling what years of research will teach you. It so turns out that Hypatia was NOT the world’s first female mathematician. Other women taught mathematics long before Hypatia, including the mathematician Pandrosion. She was one of the first