ʿIlm al-Hayʾa
(3,509 words)

, the “science of the figure (of the heavens)” or astronomy (which is also known by several other names in Arabic), is that branch of knowledge which deals with the geometrical structure of the universe, which determines the laws governing the periodic motions of the celestial bodies, which devises cinematic models to describe these motions, which reduces them to tabular form so that a computer can, with as much precision and ease as possible, determine the positions of the heavenly bodies as se…

Cite this page
Pingree, D., “ʿIlm al-Hayʾa”, 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 July 2018 <http://dx.doi.org/10.1163/1573-3912_islam_COM_0365>
First published online: 2012
First print edition: ISBN: 9789004161214, 1960-2007

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