'Ali ibn 'Isa al-Asturlabi
ʿAlī ibn ʿĪsā al-Asṭurlābī (Arabic: علي بن عيسى) was an Arab[1] astronomer and geographer of the 9th century. He wrote a treatise on the astrolabe and was an opponent of astrology. During the reign of al-Ma'mun, and together with Khālid ibn ʿAbd al‐Malik al‐Marwarrūdhī, he participated in an expion to the Plain of Sinjar to measure the length of a degree.[2] Differing reports state that they obtained a result of 56 miles (90 km), 56 and two-thirds, or 56 and one-quarter miles per degree.[3]
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Notes[]
- ^ H., Suter. "al-BADĪʿ al-ASṬURLĀBĪ". Brill. doi:10.1163/1573-3912_islam_sim_0993.
{{cite journal}}: Cite journal requires|journal=(help) - ^ Bolt 2007.
- ^ Raymond Mercier (2008). "Geodesy". In Helaine Selin (ed.). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Vol. 1. Springer. p. 966.
References[]
- Bolt, Marvin (2007). "ʿAlī ibn ʿĪsā al‐Asṭurlābī". In Thomas Hockey; et al. (eds.). The Biographical Encyclopedia of Astronomers. New York: Springer. p. 34. ISBN 978-0-387-31022-0. (PDF version)
