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ʿAbu al-Ḥasan Alāʾ al‐Dīn bin Alī bin Ibrāhīm bin Muhammad bin al-Matam al-Ansari known as Ibn al-Shatir or Ibn ash-Shatir (Arabic: ابن الشاطر; 1304–1375) was an Arab astronomer, mathematician and engineer.
Ibn asch-Schatir ( arabisch ابن الشاطر, DMG Ibn aš-Šāṭir, auch al-Shatir; oder Abu l-Hasan ʿAla' ad-Din ibn ʿAli ibn Ibrahim ibn Muhammad / أبو الحسن علاء الدين بن علي بن إبراهيم بن محمد / Abū l-Ḥasan ʿAlāʾ ad-Dīn b. ʿAlī b. Ibrāhīm b. Muḥammad; * 1304 in Damaskus [1]; † 1375 ebenda) war ein arabischer Astronom, Mathematiker und Erfinder.
Died on 1375 ʿAbu al-Ḥasan Alāʾ al‐Dīn ʿAlī ibn Ibrāhīm al-Ansari; known as Ibn al-Shatir or Ibn ash-Shatir (Arabic: ابن الشاطر ; 1304–1375) was a Syrian Arab astronomer, mathematician and engineer.
Ibn al‐Shāṭir: ʿAlāʾ al‐Dīn ʿAlī ibn Ibrāhīm. Born Damascus (Syria), circa1305. Died Damascus (Syria), circa1375. Ibn al‐Shāṭir was the most distinguished Muslim astronomer of the 14th century. Although he was head muwaqqit at the Umayyad mosque in Damascus, responsible for the regulation of the astronomically defined times ...
Ala al-Din Abu'l-Hasan ali ibn Ibrahim ibn al-Shatir. c. 1305-c. 1375. Arab astronomer who sought to restore uniform circular motion to planetary theory by replacing Ptolemy's eccentric deferent and equant with secondary epicycles.
Ibn al-Shāṭir, the long-time chief muezzin (raʾīs al-muʾadhdhinīn) and timekeeper (muwaqqit) at the Umayyad Mosque in Damascus, was one of the most important astronomers of pre-modern Islam, writing on a variety of topics and producing one of the most innovative astronomical systems prior to the advances of early modern Europe.
Ibn al‐Shāṭir died in Damascus ca. 1375. Later astronomers in Damascus and Cairo, none of whom appears to have been particularly interested in his non‐Ptolemaic models, prepared commentaries on, and new versions of, his zīj .
