Title: Az-Zarqālī and al-Biṭrūjī
Subjects: Medieval Astronomy, Arab Astronomy, Islam and science, Medieval Science, Science, History, Western Civilization, Islamic influences
Places: Islamic countries
People: Abū Isḥāk Nūr al-Dīn al-Biṭrūjī (active 1185), Ibrāhīm ibn Yaḥyá Zarqālī (-1100)