Figure 1a: Armillary sphere (dhât al-halaq) of Taqî al-Dîn. Source: Istanbul Topkapi Library, Hazine 452, f. 89 .
The Instruments of Istanbul ObservatoryLEARN MORE
In this article, Professor Sevim Tekeli, an outstanding scholar in the history of Ottoman science, describes...
Figure 1: An Armillary sphere (dhât al-halaq) located at the Istanbul Observatory founded by Taqi al-Din al-Rasid. Shahinshahnâme, Istanbul University Library, F. 1404.
The Observation WellLEARN MORE
Observation wells received much historical interest relating to observatories. In this article Prof. Aydin...
Figure 1: The trigonometric functions of an angle q can be constructed geometrically in terms of a unit circle centered at O.
Taqi al Din Ibn Ma’ruf 's Work on Extracting the Cord 2[sup]o[/sup] and Sin 1[sup]o[/sup]LEARN MORE
This article by Professor Sevim Tekeli, a leading historian of science in the Ottoman period, deals with an...
Figure 1: The determination of the prayer times according to the positions of the sun.
Principle and Use of Ottoman SundialsLEARN MORE
Muslim astronomers and engineers invented a variety of dials for timekeeping and for determining the times of...
Figure 1: Dr Geoffrey Roper (Source).
Muslim Printing Before GutenbergLEARN MORE
Gutenberg in the 15th century. Based on his work on original sources, he states that some of the early...
Figure 1: View of primary and secondary rainbows (Source).
Kamal Al-Din Al-Farisi’s Explanation of the RainbowLEARN MORE
This article focuses on a critical presentation of the arguments put forward by Kamal al-Din al-Farisi about...