Progressions, rays and houses in medieval Islamic astrology: a mathematical classification (Q2871013)
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scientific article; zbMATH DE number 6248762
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Progressions, rays and houses in medieval Islamic astrology: a mathematical classification |
scientific article; zbMATH DE number 6248762 |
Statements
21 January 2014
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applied mathematics
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medieval astrology
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astrology in medieval Islam
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planetary aspects
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projections of rays
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astrological houses
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progressions
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hour lines
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position circles
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medieval astronomical instruments
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Progressions, rays and houses in medieval Islamic astrology: a mathematical classification (English)
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From the authors' abstract: Medieval Islamic mathematicians and astronomers developed a variety of mathematical definitions and computations of the three astrological concepts of houses, rays (or aspects) and progressions. The medieval systems for the astrological houses have been classified by J. D. North and E. S. Kennedy, and the purpose of our paper is to attempt a similar classification for rays and progressions, on the basis of medieval Islamic astronomical handbooks and instruments. It turns out that there were at least six different systems for progressions, and no less than nine different systems for rays. We will investigate the historical relationships between these systems and we will also discuss the authors to whom the systems are attributed in the medieval Islamic sources.
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