Figure 1: Ottoman astronomers at work around Taqī al-Dīn at the Istanbul Observatory. Source: Istanbul University Library, F 1404, fol. 57a.
Taqi al-Din Ibn Ma’ruf: A Bio-Bibliographical EssayLEARN MORE
This article is a bio-bibliographical essay on the life and works of Taqī al-Dīn Ibn Ma'ruf, a scholar of...
Figure 1: Front cover of the first volume of Abū ‘l-Barakāt's Kitāb al-Mu'tabar (edited in Haydarabd, 1357/1938).
Abu ‘l-Barakat al-Baghdadi: Outline of a Non-Aristotelian Natural PhilosophyLEARN MORE
Abū 'l-Barakāt al-Baghdādā (flourished in the 11th-12th centuries in Baghdad) was a scholar of the Arabic-...
Figure 1: Taqī al-Dīn's observational clock is shown in the right hand side middle of this famous picture of Istanbul observatiry. Source: Istanbul University Library, MS F1404, folio 57a.
The Astronomical Clock of Taqi Al-Din: Virtual ReconstructionLEARN MORE
In his book The Brightest Stars for the Construction of Mechanical Clocks (Al-Kawakib al-durriyya fi wadh' al...
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...
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...