Back السجزي Arabic আস-সিজযি Bengali/Bangla Al-Sijzí Catalan As-Sidschzī German Al-Sijzi Spanish ابوسعید سجزی Persian Al-Sijzi French Abu Sa'id Ahmad ibn Muhammad ibn 'Abd al-Jalil al-Sijzi Italian Siczî Kurdish Al-Sijzi Dutch

Al-Sijzi

This article is about the Iranian scientist astronomer. For the Indo-Persian Sufi poet, see Hasan Sijzi.
For other people named Al-Sijistani, see Al-Sijistani.
Abu Sa'id al-Sijzi
A page from Al Sijzi's geometrical treatise
Born945 CE
Sijistan, Saffarid dynasty (modern-day Sistan)[1]
Died1020 CE
Main interests
Mathematics, Astronomy, Astrology
Model of the solar system and earth movement ("planetarium") according to al-Sijzi[2]

Abu Sa'id Ahmed ibn Mohammed ibn Abd al-Jalil al-Sijzi (c. 945 - c. 1020, also known as al-Sinjari and al-Sijazi; Persian: ابوسعید سجزی; Al-Sijzi is short for "Al-Sijistani") was an Iranian[3] 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.[4][5]

He dedicated work to 'Adud al-Daula, who was probably his patron, and to the prince of Balkh. He also worked in Shiraz making astronomical observations from 969 to 970.

  1. ^ Helaine Selin (12 March 2008). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Springer Science & Business Media. pp. 159–. ISBN 978-1-4020-4559-2.
  2. ^ "Modell des Sonnensystems und der Erdbewegung ("Planetarium") nach as-Siǧzî". Museum des Institutes für Geschichte der Arabisch-Islamischen Wissenschaften. 2010.
  3. ^ Kheirandish, Elaheh (1 April 2006). "The "Fluctuating Fortunes of Scholarship": A Very Late Review Occasioned by a Fallen Book". Early Science and Medicine. 11 (2): 214. doi:10.1163/157338206776908882.
  4. ^ Bausani, Alessandro (1973). "Cosmology and Religion in Islam". Scientia/Rivista di Scienza. 108 (67): 762.
  5. ^ Young, M. J. L., ed. (2006-11-02). Religion, Learning and Science in the 'Abbasid Period. Cambridge University Press. p. 413. ISBN 9780521028875.

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