WikiVisually
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
WikiVisually
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
Nature The World Movies USA Top Art Fine & Rare History Ivy & Inquiry
Armillary sphere
Videos
An armillary sphere is a model of objects in the sky, consisting of a spherical framework of rings, centered on Earth or the Sun, that represent lines of celestial longitude and latitude and other ast
Jost Bürgi and Antonius Eisenhoit: Armillary sphere with astronomical clock, made in 1585 in Kassel, now at Nordiska Museet in Stockholm
Jost Bürgi and Antonius Eisenhoit: Armillary sphere with astronomical clock, made in 1585 in Kassel, now at Nordiska Museet in Stockholm
Chinese Armillary sphere at Beijing Capital International Airport Ziwei Chenheng Aug-2010
Chinese Armillary sphere at Beijing Capital International Airport Ziwei Chenheng Aug-2010
The original diagram of Chinese scientist Su Song's book of 1092 showing the inner workings of his clocktower; a mechanically rotated armillary sphere
The original diagram of Chinese scientist Su Song's book of 1092 showing the inner workings of his clocktower; a mechanically rotated armillary sphere crowns the top.
Armillary sphere at Beijing Ancient Observatory, replica of an original from the Ming dynasty
Armillary sphere at Beijing Ancient Observatory, replica of an original from the Ming dynasty
Astronomy in the medieval Islamic world
Videos
Medieval Islamic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age, and mostly written in the Arabic language. These developments
18th century Persian brass astrolabe at the Whipple Museum of the History of Science in Cambridge, England. The astrolabe consists of a disk engraved
18th century Persian brass astrolabe at the Whipple Museum of the History of Science in Cambridge, England. The astrolabe consists of a disk engraved with the positions of the celestial bodies.
The Tusi-couple is a mathematical device invented by Nasir al-Din al-Tusi in which a small circle rotates inside a larger circle twice the diameter of
The Tusi-couple is a mathematical device invented by Nasir al-Din al-Tusi in which a small circle rotates inside a larger circle twice the diameter of the smaller circle. Rotations of the circles cause a point on the circumference of the smaller circle to oscillate back and forth in linear motion along a diameter of the larger circle.
An illustration from al-Biruni's astronomical works that explains the different phases of the moon, with respect to the position of the Sun.
An illustration from al-Biruni's astronomical works that explains the different phases of the moon, with respect to the position of the Sun.
Ibn al-Shatir's model for the appearances of Mercury, showing the multiplication of epicycles using the Tusi-couple, thus eliminating the Ptolemaic ec
Ibn al-Shatir's model for the appearances of Mercury, showing the multiplication of epicycles using the Tusi-couple, thus eliminating the Ptolemaic eccentrics and equant.