Porter, Dot2023-05-232022-11-232022-11-232022-11-23https://repository.upenn.edu/handle/20.500.14332/46603Diagrams, many with moving parts, designed to accompany the work Theoricae novae planetarum by 15th-century Austrian astronomer Georg von Peurbach, who taught at the universities in Padua and Ferrara. The diagrams demonstrate increasingly complex planetary motion. An early 17th-century inscription on the first flyleaf refers to an edition of Peurbach published in Venice in 1616.Planets -- OrbitsPlanetary theory -- Early works to 1800Astronomy -- Early works to 1800AstronomyPlanetary theoryCodices (bound manuscripts)DiagramsVolvellesManuscripts Latin -- 16th centuryManuscripts RenaissanceAstrophysics and AstronomyHistory of Science, Technology, and MedicineRenaissance StudiesArticle