Ioannis de Sacrobusto Libellus de sphaera : accessit eiusdem autoris computus ecclesiasticus, et alia quaedam in studiosorum gratiam edita / cum praefatione Philippi Melanthonis. Image 8.
Diagrams showing the way constellation shapes and images are projected from the round Earth. Indicates to reader how to measure angles to celestial bodies from the Earth.
Utah State University, Merrill-Cazier Library, Special Collections & Archives, Rare (COLL V BOOK 489a)
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