TITLE

BĪRŪNĪ'S FOUR-POINT METHOD FOR DETERMINING THE ECCENTRICITY AND THE DIRECTION OF THE APSIDAL LINES OF THE SUPERIOR PLANETS

AUTHOR(S)
MOZAFFARI, S. MOHAMMAD
PUB. DATE
May 2013
SOURCE
Journal for the History of Astronomy;May2013, Vol. 44 Issue 2, p207
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The article discusses the method developed by Persian astronomer Abū al-Rayhān al-Bīrūnī in his work "al-Qānūn al-mas'ūdī" for calculating the eccentricity and apsidal-line direction of the orbits of superior planets, or planets further from the Sun than Earth. The author explains the astronomer's use of an algorithm developed by astronomer Ptolemy in his work "Almagest" that requires one to establish four opposition points for a planet in relation to the Sun. Astronomer Jābir b. Aflah's use of a similar method is also explored.
ACCESSION #
86440307

 

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