Colorized schematic representation of the cosmos from "De sphaera mundi," a medieval introduction to the basic elements of astronomy written by Johannes de Sacrobosco, circa 1230. Seven concentric circles represent the orbits of the moon, the planets and the sun.

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Photo credit: © Science History Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1230, 13th, art, astronomy, century, colorized, concentric, cosmos, de, enhanced, famous, history, johannes, medieval, mundi, orbits, representation, sacrobosco, schematic, science, sphaera, textbook