Ibn Yūnus
(445 words)

(or yūnis ), whose full name was Abu ’l-Ḥasan ʿAlī b. Abī saʿīd ʿAbd al-Raḥmān b. Aḥmad b. Yūnus al-Ṣadafī , one of the most prominent Muslim astronomers, died in 399/1009.

Ibn Yūnus’s chief astronomical work, al-Zīd̲j̲ al-kabīr al-ḥākimī (not all of which seems to have survived), was begun ca. 380/990 and completed shortly before his death. Several long extracts have been published and translated, and it is one of the few zīd̲j̲e s (sets of astronomical tables) that has been treated extensively by modern scholars. He quotes a large number of astronomical observatio…

Cite this page
Goldstein, B.R., “Ibn Yūnus”, in: Encyclopaedia of Islam, Second Edition, Edited by: P. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel, W.P. Heinrichs. Consulted online on 22 October 2018 <http://dx.doi.org/10.1163/1573-3912_islam_SIM_3413>
First published online: 2012
First print edition: ISBN: 9789004161214, 1960-2007

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