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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク ʿAlī ibn ʿĪsā al-Asṭurlābī ： ウィキペディア英語版 Ali ibn Isa al-Asturlabi ʿAlī ibn ʿĪsā al-Asṭurlābī ((アラビア語:علي بن عيسى)) was an Afro-Arab 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 expedition to the Plain of Sinjar to measure the length of a degree, or the circumference of the Earth. He measured the Earth's circumference, getting a result of 40,248 km (or, according to other sources, 41,436 km). == See also == * List of Arab scientists and scholars 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「Ali ibn Isa al-Asturlabi」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.