ʿALĪ B. AḤMAD BALḴĪ, ABU’L-QĀSEM NŪR-AL-DĪN, post-3rd/9th century astronomer. Like his more famous fellow townsman, he was known as Abū Maʿšar. He wrote a Ketāb al-madḵal fī ʿelm al-aḥkām al-falakīya (“Book of the introduction to the science of astrological judgments”) in seventy-three chapters (Krause, 450), and a Ketāb al-madḵal fī ʿelm al-noǰūm (“Book of the introduction to the science of the stars”) in sixty chapters (Krause, 514); there is said to be a Persian translation of the latter. He also composed a Ketāb al-ṯamad fī bayān anna al-samāwāt be ḡayr ʿamad (“Book of the dregs [?] in explanation of the fact that the heavens are without supports”).


Brockelmann, GAL S. II, p. 298.

M. Krause, “Stambuler Handschriften islamischer Mathematiker,” Quellen und Studien zur Geschichte der Mathematik, Astronomie und Physik B, 2, 1936, pp. 437-532.

(D. Pingree)

Originally Published: December 15, 1985

Last Updated: August 1, 2011

This article is available in print.
Vol. I, Fasc. 8, p. 848

Cite this entry:

D. Pingree, “ʿALĪ B. AḤMAD BALḴĪ,” Encyclopædia Iranica, I/8, p. 848, available online at http://www.iranicaonline.org/articles/ali-b-ahmad-balki (accessed on 30 December 2012).