Xenarchus, Alexander, and Simplicius on Simple Motions, Bodies and Magnitudes, 2002
By: Hankinson, Robert J.
Title Xenarchus, Alexander, and Simplicius on Simple Motions, Bodies and Magnitudes
Type Article
Language English
Date 2002
Journal Bulletin of the Institute of Classical Studies
Volume 46
Pages 19-42
Categories no categories
Author(s) Hankinson, Robert J.
Editor(s)
Translator(s)
Aristotle accounted for the fundamental dynamics of the cosmos in terms of the tendencies of the various elements to distinct types of natural motions, and (in the case of the sublunary elements) to rest in their natural places. In so doing, he introduced a fifth element, the ether, with a natural and unceasing tendency to revolve, as the matter for the heavenly bodies. This paper deals with some of the objections raised to this model, and to its conceptual underpinnings, raised by Xenarchus of Seleuceia, an unorthodox Peripatetic of the 1 st century BC, and of the attempts of later philosophers to rebut them. In so doing it casts light on a little-known, but historically important and interesting, episode in the development of physical dynamics. [Author's abstract]

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Xenarchus, Alexander, and Simplicius on Simple Motions, Bodies and Magnitudes, 2002
By: Hankinson, Robert J.
Title Xenarchus, Alexander, and Simplicius on Simple Motions, Bodies and Magnitudes
Type Article
Language English
Date 2002
Journal Bulletin of the Institute of Classical Studies
Volume 46
Pages 19-42
Categories no categories
Author(s) Hankinson, Robert J.
Editor(s)
Translator(s)
Aristotle accounted for the fundamental dynamics of the cosmos in terms of the tendencies of the  various elements to distinct types of natural motions,  and  (in the case of the sublunary elements) to rest in their   natural  places. In so doing, he introduced  a  fifth element, the ether, with a natural and  unceasing  tendency to revolve, as the  matter for the heavenly bodies. This paper deals with some of the objections raised to this model, and to its conceptual  underpinnings,  raised by Xenarchus of Seleuceia, an unorthodox Peripatetic of the 1 st century BC, and of the attempts of later philosophers to rebut  them. In so doing it casts light on a  little-known, but historically  important  and  interesting, episode in the development of physical dynamics. [Author's abstract]

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