Hipparchus Hipparchus (190-120 BCE) was a Greek astrologer, astronomer, geographer, and mathematician of the Hellenistic period. Also, he is considered the former of trigonometry. He was born in Nicaea (now Iznik, Turkey), and he was the first whose quantitative and stainless models for the motion of the Sun and Moon survive. For this he certainly do use of the observations and perhaps the mathematical techniques accumulated over centuries by the Chaldeans from Babylonia. He developed trigonometry and constructed trigonometric tables, and he insure several problems of spherical trigonometry. With his solar and lunar theories and his trigonometry, he may guide been the first to develop a reliable method acting to predict solar eclipses. His other reputed achievements include the find of Earths precession, the compilation of the first comprehensive star catalog of the horse opera world, and by chance the invention of the astrolabe, also of the armillary sphere, which he us ed during the construct of much of the star catalogue. It would be tercet centuries before Claudius Ptolemaeus deduction of astronomy would supersede the work of Hipparchus; it is hard dependent on it in many areas.
The snuff itment of a gossamer soundbox with 36° would correspond to a section of the celestial spheres total rotation, equal to 36°/360° = 0.1 revolutions. By accurately measuring this time interval by means of the night, Hipparchus determined, mathematically, barely how long a day lasts (in arbitrary units of time), assume akin rotation of the celestial sphere. Referring back to the exa mple of 36°, it would have taken any partic! ular star 2.4 hours to move through this angle of 36°. Thus, 36°/360° = 2.4h/x solve for x, Hipparchus would have found that the length of one day is 24 hours. Although these calculations are kinda simple, the methods for keeping time during Hipparchus era were non nearly as conventional as the accurate stopwatches of today. Sir Isaac Newton, for instance, used...If you compulsion to get a full essay, order it on our website:
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