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Abū Muḥammad 'Abd al-Jabbār al-Kharaqī, also Al-Kharaqī was a Persian astronomer and mathematician of the 12th century, born in Kharaq near Merv.〔''Encyclopaedia of the history of science, technology, and medicine'', ed. Helaine Selin, (p.478 )〕 He was in the service of Sultan Sanjar at the Persian Court. Al-Kharaqī challenged the astronomical theory of Ptolemy in the ''Almagest'', and established an alternative theory of the spheres, imagining huge material spheres in which the planets moved inside tubes.〔 During his travels to the Ottoman Empire in 1536, Guillaume Postel acquired an astronomical work by al-Kharaqī, ''Muntahā al-idrāk fī taqāsīm al-aflāk'' ("The Ultimate Grassp of the Divisions of Spheres"), annotated it, and brought it back to Europe.〔''Islamic science and the making of European Renaissance'', by George Saliba, p.218 ISBN 978-0-262-19557-7〕 Al-Kharaqī also wrote mathematical treatises, now lost, ''Al-Risala al-Shāmila'' ("Comprehensive Treatise") and ''Al-Risala al-Maghribiyya'' ("The North African Treatise", related to the calculus of dirham and dinar).〔 ==Works== * ''Muntahā al-idrāk fī taqāsīm al-aflāk'' ("The Ultimate Grassp of the Divisions of Spheres") 1138/9 * ''Al-Risala al-Shāmila'' ("Comprehensive Treatise") * ''Al-Risala al-Maghribiyya'' ("The North African Treatise") 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Al-Kharaqī」の詳細全文を読む スポンサード リンク
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