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Abū al-Fath Abd al-Rahman Mansūr al-Khāzini or simply al-Khāzini (أبوالفتح عبدالرحمن منصور الخازنی (Persian), flourished 1115–1130) was an Iranian[1][2] astronomer of Greek origin[3] from Seljuk Persia.[4] His astronomical tables written under the patronage of Sultan Sanjar (Zīj al-Sanjarī, 1115) is considered to be one of the major works in mathematical astronomy of the medieval period.[5]:107 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]:197 He also wrote extensively on various calendrical systems and on the various manipulations of the calendars.[5] He was the author of an encyclopedia on scales and water-balances.[7]

al-Khazini
Born11th century
Persia
Died12th century
OccupationMuslim scientist
Scientific career
FieldsAstronomy, mathematics
InfluencesOmar Khayyam, Al-Isfizari
InfluencedNasir al-Din al-Tusi, George Chrysococces, Theodore Meliteniotes, al-Kashi, Ulugh Beg

Life


Al-Khazini was an emancipated slave in Marv,[6]:197[8] which was then one of the most important cities of Khorasan. He got his name from his master (Abu‘l Husayn ‘Alī ibn Muhammad al-Khāzin al-Marwazī) who was the treasurer of Marv.[5]:107 The term khāzin was simply the title of the royal treasurer since the early Islamic period.[9] His master made provisions so that al-Khazini could obtain a first-class education.[5] Some believe that al-Khazini was a pupil of Omar Khayyam.[8] While this is not known, he wrote about Khayyam, in particular, he gave a description of the water-balance invented by him (and improved upon by Al-Isfizari).[6]:176 And according to some sources, he collaborated with him on the reformation of the Persian calendar in 1079.[10]:199

Al-Khazini was known for being a humble man. He refused thousands of Dinar for his works, saying he did not need much to live on because it was only his cat and himself in his household.[7] Al-Khazini was one of only about twenty astronomers of the Islamic era who performed original observations.[7] His works reached Byzantium in the 14th century, in particular, they were studied by George Chrysococces and later by Theodore Meliteniotes.[5]:107


Achievements


Al Khazini seems to have been a high government official under Sanjar ibn Malikshah and the sultan of the Seljuk Empire. He did most of his work in Merv, where they are known for their libraries.[7] His best-known works are "The Book of the Balance of Wisdom", "Treatise on Astronomical Wisdom", and "The Astronomical Tables for Sanjar".[7]

"The Book of the Balance of Wisdom" is an encyclopedia of medieval mechanics and hydrostatics composed of eight books with fifty chapters.[7] It is a study of the hydrostatic balance and the ideas behind statics and hydrostatics, it also covers other unrelated topics.[7] There are four different manuscripts of "The Book of the Balance of Wisdom" that have survived.[7] The balance al-Khazini built for Sanjar's treasury was modeled after the balance al-Asfizari, who was a generation older than al-Khazini, built.[7] Sanjar's treasurer out of fear destroyed al-Asfizari's balance; he was filled with grief when he heard the news.[7] Al-Khazini called his balance "combined balance" to show honor towards Al-Asfizari.[7] The meaning of the balance was a "balance of true judgment".[7] The job of this balance was to help the treasury see what metals were precious and which gems were real or fake.[7] In "The Book of the Balance of Wisdom" al-Khazini states many different examples from the Koran ways that his balance fits into religion.[7] When al-Khazini explains the advantages of his balance he says that it "performs the functions of skilled craftsmen", its benefits are theoretical and practical precision.[7]

The "Treatise on Astronomical Wisdom" is a relatively short work.[7] It has seven parts and each part is assigned to a different scientific instrument.[7] The seven instruments include: a triquetrum, a dioptra, a "triangular instrument," a quadrant, devices involving reflection, an astrolabe, and simple tips for viewing things with the naked eye.[7] The treatise describes each instrument and its uses.[7]

"The Astronomical Tables for Sanjar" is said to have been composed for Sultan Sanjar, the ruler of Merv and his balance was made for Sanjar's treasury.[7] The tables in "The Astronomical Tables for Sanjar" are tables of holidays, fasts, etc.[7] The tables are said to have the latitudes and longitudes of forty-three different stars, along with their magnitudes and (astrological) temperaments.[7] It is said that al-Khazini's observations for this work were probably done in Merv in various observatories with high quality instruments.[7]


See also



References


  1. Winter, H. J. J. (February 1986). "PERSIAN SCIENCE IN SAFAVID TIMES". The Cambridge History of Iran.
  2. "پژوهش‌های ایرانی | سرنوشت خازنی: داستان غم انگیز دانشمندان ایران" (in Persian). Retrieved 2020-04-08.
  3. Vernet, J. (2012-04-24). "al-K̲h̲āzinī". Encyclopaedia of Islam, Second Edition.
  4. Durant, Will; Durant, Ariel (2011) [1950]. The Story of Civilization: The Age of Faith. Simon & Schuster. p. 352. ISBN 9781451647617.
  5. Montelle, C. (2011). The ‘Well-Known Calendars’: Al-Khāzinī’s Description of Significant Chronological Systems for Medieval Mathematical Astronomy in Arabic. In Steele J. (Ed.), Calendars and Years II: Astronomy and Time in the Ancient and Medieval World (pp. 107-126). Oxford; Oakville: Oxbow Books.
  6. Meyerhof, M. (1948). 'Alī al-Bayhaqī's Tatimmat Siwān al-Hikma: A Biographical Work on Learned Men of the Islam. Osiris, 8, 122-217.
  7. Al-Khāzinī, Abu'l-Fath 'Abd Al-Raḥmān [Sometimes Abū Manṣūr ' Abd Al-Raḥmān or 'Abd Al-Rahmān Manṣūr]., Complete Dictionary of Scientific Biography., 2008, pp. 335–351
  8. Rosenfeld, B. (1994), Book reviews: Middle ages & renaissance., Journal of the History of Science in Society, pp. 85(4), 686
  9. Floor, Willem. "kazinadar". Encyclopædia Iranica. Retrieved 4 December 2017.
  10. Mehdi Aminrazavi, The Wine of Wisdom: The Life, Poetry and Philosophy of Omar Khayyam, Oneworld Publications (2007)

На других языках


[de] Al-Chazini

Al-Chazini (international auch al-Khazini), eigentlich Abu’l-Fath ‘Abd al-Raḥmān al-Chāzinī (أبوالفتح عبدالرحمن منصور الخازنی), war ein Astronom byzantinischer Herkunft. Er schrieb über Mechanik und wissenschaftliche Instrumente und wirkte in der ersten Hälfte des 12. Jahrhunderts in Merw.
- [en] Al-Khazini

[es] Al-Jazini

Abu al-Fath Abd al-Rahman Mansour al-Khāzini o Abu al-Fath Jāzini (en árabe, أبو الفتح الخازني‎, en persa, ابولفتح خازنی‎) (época de actividad: 1115–1130) fue un astrónomo musulmán de etnia greco bizantina de Merv, en la provincia de Jorasán, (hoy localizada en Turkmenistán). Fue conocido por sus logros literarios y científicos.[1]

[fr] Al-Khazini

Abu’l-Fath ‘Abd Al-Raḥmān Al-Khāzinī est un astronome et physicien Iranien[1],[2] d'origine Grecque[3] ayant travaillé à Merv dans la première moitié du XIIe siècle. Il est l'auteur de tables astronomiques, d'un traité sur les instruments et d'un autre traitant de la statique et des centres de gravité.

[it] Abu l-Fath al-Khazini

Abū l-Fatḥ ʿAbd al-Raḥmān al-Khāzinī (in arabo: ﺍﺑﻮ ﺍﻟﻔﺘﺢ ﻋﺒﺪ ﺍﻟﺮﺣﻤﺎﻥ ﺍﻟﺨﺎﺯﻧﻲ‎; 1115 – 1155) è stato un astronomo e fisico bizantino, convertito all'Islam e attivo a Merv (Khorasan).

[ru] Абдуррахман аль-Хазини

Абу-ль-Фатх Абдуррахман Мансур аль-Ха́зини (араб. أبو الفتح عبد الرحمن منصور الخازني‎, первая половина XII века) — видный среднеазиатский механик, физик, астроном, математик, философ и алхимик[1], ученик Омара Хайяма.



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