Article ID: CBB798855919

An Alfonsine Universe: Nicolò Conti and Georg Peurbach on the Threefold Motion of the Fixed Stars (2019)

unapi

Among the characteristic features of Georg Peurbach's influential Theoricae novae planetarum (1454) was a model of the motion of the fixed stars, based on the Alfonsine Tables, that involved both an eighth sphere undergoing trepidation and a ninth sphere subject to linear precession. Instead of being an innovation on Peurbach's part, the model in question can be shown to have been derived from an obscure treatise De triplici motu octave spere written in 1450 by the Paduan astrologer Nicolò Conti (d. 1468). The main purpose of this article is to highlight relevant parallels between the two works, especially in their use of diagrams, and to present evidence of personal ties between Conti and Peurbach, which explain how the model in question was transmitted from Padua to Vienna. In addition, it discusses the astrological impetus behind Conti's physical model, which was based on the notion that the slow motion of the fixed stars influences the course of history.

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Authors & Contributors
Malpangotto, Michela
Chabás, José
Goldstein, Bernard R.
Majeski, Anna Theresa
David Valls-Gabaud
Nagel, Alexander
Concepts
Astronomy
Astrology
Cosmology
Alphonsine Tables
Mathematics
Stars; stellar astronomy
Time Periods
15th century
Renaissance
Medieval
16th century
14th century
Early modern
Places
Vienna (Austria)
Europe
Padua (Italy)
Paris (France)
Cracow (Poland)
Prague (Czechia)
Institutions
Universität Wien
International Astronomical Union (IAU)
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