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REGIOMONTANUS (1436-1476)

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Originally appearing in Volume V23, Page 40 of the 1911 Encyclopedia Britannica.
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REGIOMONTANUS (1436-1476) , See also:German astronomer, was See also:born at See also:Konigsberg in See also:Franconia on the 6th of See also:June 1436. The son of a See also:miller, his name originally was Johann See also:Muller, but he called himself, from his birthplace, Joh. de Monteregio, an appellation which became gradually modified into Regiomont anus. At See also:Vienna, from 1452, he was the See also:pupil and See also:associate of See also:George Purbach (1423—1461), and they jointly undertook a reform of See also:astronomy rendered necessary by the errors they detected in the Alphonsine Tables. In this they were much hindered by the lack of correct See also:translations of See also:Ptolemy's See also:works; and in 1462 Regiomontanus accompanied See also:Cardinal See also:Bessarion to See also:Italy in See also:search of See also:authentic See also:manuscripts. He rapidly mastered See also:Greek at See also:Rome and See also:Ferrara, lectured on Alfraganus at See also:Padua, and completed at See also:Venice in 1463 Purbach's See also:Epitome in Cl. Ptolemaei magnam compositionem (printed at Venice in 1496), and his own De Triangulis (See also:Nuremberg, 1533), the earliest See also:work treating of See also:trigonometry as a substantive See also:science. A See also:quarrel with George of See also:Trebizond, the blunders in whose See also:translation of the Almagest he had pointed out, obliged him to quit Rome precipitately in 1468. He repaired to Vienna, and was thence summoned to Buda by See also:Matthias See also:Corvinus, See also:king of See also:Hungary, for the purpose of collating Greek manuscripts at a handsome See also:salary. He also finished his Tabulae Directionum (Nuremberg, 1475), essentially an astrological work, but containing a valuable table of tangents. An outbreak of See also:war, meanwhile, diverted the king's See also:attention from learning, and in 1471 Regiomontanus settled at Nuremberg. Bernhard See also:Walther, a See also:rich patrician, became his pupil and See also:patron; and they together equipped the first See also:European See also:observatory, for which Regiomontanus himself constructed See also:instruments of an improved type (described in his See also:posthumous Scripta, Nuremberg, 1544). His observations of the See also:great See also:comet of See also:January 1672 supplied the basis of See also:modern cometary astronomy.

At a See also:

printing-See also:press established in Walther's See also:house by Regiomontanus, Purbach's Theoricae planetarum novae was published in 1472 or 1473; a See also:series of popular calendars issued from it, and in 1474 a See also:volume of Ephemerides calculated by Regiomontanus for See also:thirty-two years (1474–1506), in which the method of " lunar distances," for determining the See also:longitude at See also:sea, was recommended and explained. In 1472 Regiomontanus was summoned to Rome by See also:Pope See also:Sixtus IV. to aid in the reform of the See also:calendar; . and there he died, most likely of the See also:plague, on the 6th of See also:July 1476.

End of Article: REGIOMONTANUS (1436-1476)

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