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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]
Gerald James Toomer (born 23 November 1934) is a historian of astronomy and mathematics who has written numerous books and papers on ancient Greek and medieval Islamic astronomy. In particular, he translated Ptolemy's Almagest into English.
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]
Theon was the father of the mathematician Hypatia, who succeeded him as head of his school [5] Theon dedicated his commentary on the Almagest to a boy named Epiphanius, who may have been his son. [6] Also, in his commentary on the Almagest he states that his daughter Hypatia contributed to Book III of the Almagest stating "the edition having ...
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]
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 book was thoroughly illustrated along with observations and descriptions of the stars, their positions (copied from Ptolemy's Almagest with the longitudes increased by 12° 42' to account for the precession), their magnitudes (brightness) and their color.
Gerard was born in Cremona in northern Italy. Dissatisfied with the philosophies of his Italian teachers, Gerard went to Toledo. There he learned Arabic, initially so that he could read Ptolemy's Almagest, [3] which had a traditionally high reputation among scholars, but which, before his departure to Castile, was not yet known in Latin translation.