Al-Khazin | |
|---|---|
ابوجعفر خازن خراسانی | |
| Born | 900 |
| Died | 971 |
| Academic work | |
| Era | Islamic Golden Age |
| Main interests | Mathematics,astronomy |
Abu Jafar Muhammad ibn Husayn Khazin (Persian:ابوجعفر خازن خراسانی; 900–971), also calledAl-Khazin, was anIranian[1] Muslimastronomer andmathematician fromKhorasan. He worked on bothastronomy andnumber theory.
Al-Khazin was one of the scientists brought to the court inRay, Iran by the ruler of theBuyid dynasty,Adhad ad-Dowleh, who ruled from 949 to 983. In 959/960, Khazin was required to measure theobliquity of the ecliptic by thevizier of Ray, who was appointed by ad-Dowleh.
One of Al-Khazin's worksZij al-Safa'ih ("Tables of the Disks of the Astrolabe") was described by his successors as the best work in the field and they make many references to it.[2] The work describes some astronomical instruments, in particular anastrolabe fitted with plates inscribed with tables, and a commentary on the use of these. A copy of this instrument was made, but it vanished in Germany during World War II. A photograph of this copy was taken and examined by the historianDavid King in 1980.[3]
Al-Khazin also wrote a commentary on the RomanpolymathPtolemy'sAlmagest in which he gives 19 propositions relating to statements by Ptolemy, and proposed a different model of the cosmos.[4]
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