ҁAlī ibn ҁĪsā al-Asṭurlābī
FlourishedDamascus, (Syria), 832
ҁAlī ibn ҁĪsā al-Asṭurlābī, author of an early Arabic treatise on the astrolabe and an opponent of astrology, enjoyed renown as an astronomical instrument maker and contributed to observations initiated by the ҁAbbāsid caliph Ma'mūn. He took part with Khālid ibn ҁAbd al-Malik al-Marwarrūdhī and others in an expedition to the Plain of Sinjār to measure 1° of latitude and, thus, the size of the Earth. ҁAlī ibnҁĪsā made astronomical observations at Baghdad in 829/830 and at Damascus in 832–833. He divided the mural quadrant used for the Damascus observations to confirm results of the earlier missions.
- Barani, Syed Hasan (1951). “Muslim Researches in Geodesy.” In Al-Bīrūnī Commemoration Volume, A.H. 362-A.H. 1362, pp. 1–52. Calcutta: Iran Society. (Includes transcriptions and an analysis of Arabic primary sources, as well as translations.)Google Scholar
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- Rosenfeld, B. A. and Ekmeleddin Ihsanoğlu (2003). Mathematicians, Astronomers, and Other Scholars of Islamic Civilization and Their Works (7 th – 19 th c.). Istanbul: IRCICA, p. 28.Google Scholar
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