Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ahes...58..143m&link_type=abstract
Archive for History of Exact Sciences (ISSN 0003-9519), Vol. 58, No. 2, p. 143 - 182 (2004)
Astronomy and Astrophysics
Astronomy
History Of Astronomy, Fixed Stars: Theory Of Motions
Scientific paper
The problem which this paper deals with is the following: were the homocentric models of Eudoxus alluded to by Aristotle (Metaphysics, xii.8) preserved in al-Bitrūjī's Kitab fi'l-hay'a, as argued by Kennedy in his reviews of Carmody's edition of Scot's Latin version and Goldstein's English translation based on the Arabic and Hebrew versions of the work - or, as asserted by Goldstein, was the essence of al-Bitrūjī's reform to place Ptolemaic models on the surface of a sphere, influenced by the tradition of the trepidation theory and especially by Ibn al-Zarqallu's contributions, without knowledge whatever of Eudoxus? To answer this question, this paper presents an analysis and new translation of the second chapter of al-Bitrūjī's work, devoted to the motion of the stars, based on the two extant Latin versions. From them it follows that the model described in this chapter is indeed a Eudoxan couple, whose hippopede accounts for the motions of the stars: in al-Bitrūjī's words, a true motion in declination and another, merely apparent, in accession and recession.
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