Khazina sultan biography of williams

Persian astronomer and mechanician (–)

This article is about the 12th century scientist. For the 10th century astronomer and physician, see Abū Ja'far al-Khāzin.

Abū al-Fath Abd al-Rahman Mansūr al-Khāzini or simply al-Khāzini (أبوالفتح عبدالرحمن منصور الخازنی&#;(Persian), flourished –) was an Iranianastronomer of Byzantine origin who lived during the Seljuk Empire.^[1][2][3][4] His astronomical tables written under the patronage of Sultan Sanjar (Zīj al-Sanjarī, ) is considered to be one of the major works in mathematical astronomy of the medieval period.^[5]:&#;&#; He provided the positions of fixed stars, and for oblique ascensions and time-equations for the latitude of Marv in which he was based.^[6]:&#;&#; He also wrote extensively on various calendrical systems and on the various manipulations of the calendars.^[5] Al-Khazini was the author of an encyclopedia on scales and wat