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Almagest
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The Almagest is a 2nd-century mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy in Koine Greek. One of the most influential s
An edition in Latin of the Almagestum in 1515
An edition in Latin of the Almagestum in 1515
Table of contents to a 1528 copy of Almagest, translated to Latin from Greek by George of Trebizond
Table of contents to a 1528 copy of Almagest, translated to Latin from Greek by George of Trebizond
Ptolemy's Almagest became an authoritative work for many centuries.
Ptolemy's Almagest became an authoritative work for many centuries.
Picture of George of Trebizond's Latin translation of the Syntaxis Mathematica or Almagest
Picture of George of Trebizond's Latin translation of the Syntaxis Mathematica or Almagest
Astronomy in the medieval Islamic world
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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.