Al-Sijzi
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Abu Sa'id Ahmed ibn Mohammed ibn Abd al-Jalil al-Sijzi was an Iranian Muslim astronomer, mathematician, and astrologer. He is notable for his correspondence with al-Biruni and for proposing that the E
A page from Al Sijzi's geometrical treatise
Model of the Solar System and Earth movement ("planetarium") according to al-Sijzi
Gravure originale du compas parfait par Abū Sahl al Qūhī
Al-Biruni
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Abu Rayhan Muhammad ibn Ahmad al-Biruni, known as al-Biruni was a Khwarazmian Iranic scholar and polymath during the Islamic Golden Age. He has been called variously "Father of Comparative Religion",
Al-Sijzi
…سجزی; Al-Sijzi is short for "Al-Sijistani") was an Iranian Muslim astronomer, mathematician, and astrologer. He is notable for his correspondence with al-Biruni and for proposing that the Earth rotates around its axis in the 10th century. He dedicated work to 'Adud al-Daula, who was probably his patron, and to…
An imaginary rendition of Al Biruni on a 1973 Soviet postage stamp
An illustration from al-Biruni's astronomical works in Persian, explains the different phases of the Moon, with respect to the position of the Sun
Four directions and political divisions of Iran by Abū Rayḥān al-Bīrūnī
The statue of Al-Biruni in United Nations Office in Vienna