Sijzi
(????-1020)
Persian astronomer and mathematician (c.945-c.1020)
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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 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.
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| Born | Sijistan, Saffarid dynasty (modern-day Afghanistan) |
| Died |
1020 (aged )
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