One of the most famous creations of Caspar Vopel, the German mathematician and geographer, is a armillary sphere, consisting of a terrestrial globe only 3 inches in diameter, bearing a hand-drawn map with names of regions written in red and the location of important cities marked with red dots. Constructed in 1543, the globe is contained within 11 interlocking armillary rings that illustrate the rotation of the sun, moon and stars in the Ptolemaic tradition, with the Earth at the center of the universe. It’s preserved in the Library’s Geography and Map Division. Read original article: Read More
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