Titlebook: Biographical Encyclopedia of Astronomers; Philip David Nicholson,Jennifer Lynn Bartlett Living reference work 20250th edition historical

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eriod..Individual entries vary from 100 to 1500 words, including luminaries such as Aristarchus, Claudius Ptolemy, Sir Isaac Newton and Albert Einstein, as well as lesser-known astronomers like Galileo‘s acolyt978-1-0716-0738-1

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,Ashraf: al-Malik al-Ashraf (Mumahhid al-Dīn) ҁUmar ibn Yūsuf ibn ҁUmar ibn ҁAlī ibn Rasūl,11 learned treatises including works on medicine, genealogy, agriculture, veterinary medicine, astronomy, and astrology, but not all are preserved. He also constructed astrolabes and most probably other astronomical instruments. His scholarly contributions overshadow his brief reign, which only last

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,Ibn al-Raqqām: Abū ,Abd Allāh Muḥammad ibn Ibrāhīm ibn ,Alī ibn Aḥmad ibn Yūsuf al-Mursī al-Andaluss a versatile master (.), unique in his time for his skills in arithmetic, geometry, medicine, astronomy, and other disciplines. Three of the astronomical texts that he authored have survived to the present day. Two of them consist of .es, or handbooks with tables, that were derived from the writing

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,Majrīṭī: Abū al-Qāsim Maslama ibn Aḥmad al-Ḥāsib al-Faraḍī al-Majrīṭī,re mainly in the field of mathematical astronomy, although it is known that he wrote on commercial arithmetic (. .) and was also a renowned astrologer. In addition to his own compositions, Majrīṭī’s importance lies within the context of Andalusian science and his activity in scientific teaching. Maj

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