Ali ibn Isa al-Asturlabi

Alī ibn ʿĪsā al-Asṭurlābī
Alī ibn ʿĪsā al-Asṭurlābī
علي بن عيسى
Born	before 858
Academic work
Era	Islamic Golden Age
Main interests	Geography, astronomy

ʿAlī ibn ʿĪsā al-Asṭurlābī (Arabic: علي بن عيسى, fl. 832) was a 9th century Arab^[1] geographer and astronomer. 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 expedition 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]

References

^ Suter, H. (2012). "Al-Badīʿ Al-Asṭurlābī". Brill Publishers. doi:10.1163/1573-3912. ISBN 9789004161214. {{cite journal}}: Cite journal requires |journal= (help)
^ Bolt 2007, p. 34.
^ 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. Bibcode:2008ehst.book.....S.

Sources

Bolt, Marvin (2007). "ʿAlī ibn ʿĪsā al-Asṭurlābī". In Hockey, Thomas; et al. (eds.). Biographical Encyclopedia of Astronomers. Springer Publishers.

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[1] Suter, H. (2012). "Al-Badīʿ Al-Asṭurlābī". Brill Publishers. doi:10.1163/1573-3912. ISBN 9789004161214. {{cite journal}}: Cite journal requires |journal= (help)

[FOOTNOTEBolt200734-2] Bolt 2007, p. 34.

[3] 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. Bibcode:2008ehst.book.....S.

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