at-Tusi
15.02.2009 14:04 | "Astronomy"

Polnoe imya: Nasir ad-Din Abu Dzhafar Muhammad ibn Muhammad at-Tusi. Azerbaidzhanskii uchenyi-enciklopedist. R. v Tuse (Horasan, Yuzhnyi Azerbaidzhan). Poluchil raznostoronnee obrazovanie. V 1235-1256 zhil v kreposti Alamut, stolice gosudarstva ismailitov-assasinov. V 1256 byl lichnym sovetnikom mongol'skogo zavoevatelya Hulagu-hana, vnuka Chingishana. Osnoval v 1259 krupneishuyu v to vremya v mire observatoriyu v Marage, bliz Tebriza.

al-Battani
15.02.2009 11:20 | "Astronomy"

Polnoe imya: Abu Abdallah Muhammad ibn Dzhabir ibn Sinan al-Battani. V gorodah Rakka i Damask mezhdu 877 i 919 provel mnozhestvo astronomicheskih nablyudenii. Pervym predlozhil metody vychisleniya sfericheskih treugol'nikov, razvitye v dal'neishem arabskimi matematikami. Sostavil bolee tochnye, po sravneniyu s sushestvovavshimi v to vremya, tablicy dvizheniya Solnca i Luny.