Theorica Planetarum

This work is bound in the same volume as the Sphaera Mundi by Johannes de Sacro Bosco. This particular work was penned by Gerardo da Cremona (c.1113-1187)who translated into Latin abandoned Arabic works found in the libraries of Toledo, Spain. Through his translations, he transmitted Greek, Arabic and Jewish knowledge in astronomy, medicine and other sciences. He himself wrote treatises on alge…