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An edition in Latin of the Almagestum in 1515. The Almagest (/ ˈ æ l m ə dʒ ɛ s t / AL-mə-jest) is a 2nd-century mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy (c. AD 100 – c. 170) in Koine Greek. [1]
The Handy Tables elaborated the astronomical tables of the Almagest and included usage instructions, but left out the theoretical commentary in order to facilitate practical computation. The work is considered of high significance during the late antiquity and in the Middle Eastern and Eastern Mediterranean medieval traditions. [1] [2] [3]
In particular, he translated Ptolemy's Almagest into English. Formerly a fellow of Corpus Christi College , Cambridge University , he moved to Brown University as a special student in 1959 to study "the history of mathematics in antiquity and the transmission of these systems through Arabic into medieval Europe."
English: Diagram of the geocentric epicyclic planetary model used in the w:en:Almagest to describe the longitudinal motion of Venus, Mars, Jupiter, and Saturn. The Earth is represented by ⊕, and the planet is represented by ☉.
The Almagest is one of the most influential books in the history of Western astrology. The Almagest was a monumental series of 13 books including roughly a quarter-million words in Greek that gave a comprehensive treatment of astrology until its time, incorporating theorems, models, and observations from many previous mathematicians. [36]
Ptolemy's work the Almagest had wide and long-lasting acceptance and influence for over a millennium. He gave a geometrical lunar theory that improved on that of Hipparchus by providing for a second inequality of the Moon's motion, using a device that made the apparent apogee oscillate a little – prosneusis of the epicycle.
The table of chords, created by the Greek astronomer, geometer, and geographer Ptolemy in Egypt during the 2nd century AD, is a trigonometric table in Book I, chapter 11 of Ptolemy's Almagest, [1] a treatise on mathematical astronomy. It is essentially equivalent to a table of values of the sine function.
The Ptolemaic model of the universe was geocentric, meaning it taught that the Sun revolved around the Earth. In the Almagest, Ptolemy proposed a division problem for calculating the number of degrees swept out by the Sun in a single day as it orbits the Earth. In his early commentary, Theon had tried to improve upon Ptolemy's division calculation.