Figure 1. Portrait of Copernicus (beginning of the 16th century). Source: http://www.frombork.art.pl/Ang10.htm.
Copernicus and Arabic Astronomy: A Review of Recent ResearchLEARN MORE
On the occasion of 464th anniversary of the death of Copernicus, we provide below a list of selected...
Figure 2: Shlomo Pines (1908–1990). (Source).
Figure 1b: Armillary sphere of Tycho Brahe. (Source).
Figure 2a: Mural quadrant (libna) of Taqî al-Dîn. Source: Istanbul Topkapi Library, Hazine 452, f. 9a.
Figure 2b: Mural quadrant of Tycho Brahe. (Source).
Figure 3a: Azimuthal semicircle (dhât al-samt wa-'l-irtifâ') of Taqî al-Dîn. Source: Istanbul Topkapi Library, Hazine 452, f. 10a.
Figure 3b: Azimuthal semicircle of Tycho Brahe. (Source).
Figure 4a: Parallactic instrument of Taqî al-Dîn. Source: Istanbul Topkapi Library, Hazine 452, f. 11ba.
Figure 4b: Parallactic instrument of Tycho Brahe. (Source).
Figure 5a: Wooden quadrant of Taqî al-Dîn.
Figure 5b: Wooden quadrant of Tycho Brahe. (Source).
Figure 6: Diopra (dhât al-thuqbatayn).
Figure 7: Instrument with cords (dhât al-awtâr).
Figure 8a: Sextant (mushabbaha bi'l-manâtiq) of Taqî al-Dîn. Source: Istanbul Topkapi Library, Hazine 452, f. 14b.
Figure 8b: Sextant of Tycho Brahe. (Source).
Figure 9: Observational clock.
Figure 10a: Transversal divisions of Al-‘Âmilî.
Figure 10b: Transversal divisions of Tycho Brahe.
Figure 11: Azimuthal quadrant of Nâsir al-Din Tûsî.
Figure 12: Azimuthal Instrument of Ibn Sînâ.
Figure 2: The Escapement Mechanism generating incremental movement of the crown wheel.
Figure 3: Novel gravity system introduced as a source to power the clock.
Figure 4: Schematic side view of the main mechanisms in the clock.
Figure 5: Details of the escapement and top view of the pallets.
Figure 6: Schematic diagram of the striking train system.
Figure 7: Count wheel.
Figure 8: Examples of clock housing framework.
Figure 9: Side view of striking train
Figure 10: Examples of levers with ends designed for hooking or engaging the count wheel.
Figure 11: Three dimensional view of the Striking Train.
Figure 12: Schematic diagram of the alarm system.
Figure 13: Front and side view of the dial wheel.
Figure 14: Bird-Dragon mechanism.
Figure 15: Dragon and verge connection.
Figure 16: Configuration of display wheel and view from the front facade.
Figure 17: The great wheel.
Figure 18: Overal mechanism of the clock.
Figure 19: Schematic diagram of the internal workings of the clock.
Figure 22: Close up of the escapement.
Figure 23: Pallets with 120o between them.