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Hipparchus (/ h ɪ ˈ p ɑːr k ə s /; Greek: Ἵππαρχος, Hipparkhos; c. 190 – c. 120 BC) was a Greek astronomer, geographer, and mathematician.He is considered the founder of trigonometry, but is most famous for his incidental discovery of the precession of the equinoxes. Hipparchus was born in Nicaea, Bithynia, and probably died on the island of Rhodes, Greece.He is known to have been a working astronomer between 162 and 127 BC. Hipparchus is considered the greatest ancient ...
Hipparchus’s most important astronomical work concerned the orbits of the Sun and Moon, a determination of their sizes and distances from Earth, and the study of eclipses.Like most of his predecessors—Aristarchus of Samos was an exception—Hipparchus assumed a spherical, stationary Earth at the centre of the universe (the geocentric cosmology).From this perspective, the Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn (all of the solar system bodies visible to the naked eye), as ...
Mar 15, 2022 · Hipparchus of Nicea (l. c. 190 - c. 120 BCE) was a Greek astronomer, geographer, and mathematician regarded as the greatest astronomer of antiquity and one of the greatest of all time. He is best known for his discovery of the precession of the equinoxes and contributed significantly to the field of astronomy on every level.
Toomer claims that Hipparchus defined his Crd function at 7. 5 ° intervals (1 48 \large\frac{1}{48}\normalsize 4 8 1 of the circle) and used linear interpolation to find the value at intermediate points. He then goes on to show that the table can be computed from some basic formulae which would be known to Hipparchus, one of which is the supplementary angle theorem, essentially Pythagoras's theorem, and the half-angle theorem. The only trace of Hipparchus's tables that survives is in Indian ...
Aug 26, 2016 · Lived c. 190 BC - c. 120 BC. Hipparchus was one of antiquity's greatest scientists. A Greek mathematician and astronomer, he measured the earth-moon distance accurately, founded the mathematical discipline of trigonometry, and his combinatorics work was unequalled until 1870. Hipparchus discovered the precession of the equinoxes and observed the appearance of a new star
Hipparchus, or Hipparchos, (born, Nicaea, Bithynia—died after 127 bc, Rhodes?), Greek astronomer and mathematician.He discovered the precession of the equinoxes (see equinoxes, precession of the), calculated the length of the year to within 6.5 minutes, compiled the first known star catalog, and made an early formulation of trigonometry.His observations were painstaking and extremely accurate. He rejected all astrology but also Sun-centred views of the universe; his views had a profound ...
Hipparchus (Greek Ἳππαρχος) (ca. 190 B.C.E. - ca. 120 B.C.E.) was a Greek, astronomer, geographer, and mathematician of the Hellenistic period.He is known to have been active at least from 147 B.C.E. to 127 B.C.E. Hipparchus is considered the greatest astronomical observer, and by some the greatest astronomer of classical antiquity. He was the first Greek to develop quantitative and accurate models for the motion of the Sun and Moon, making use of the observations and knowledge ...
May 29, 2018 · HIPPARCHUS(b. Nicaea, Bithynia [now Iznik, Turkey],first quarter of second century B.C.; d.Rhodes[?], after 127B.C)astronomy, mathematics geography.The only certain biographical datum concerning Hipparchus is his birthplace, Nicaea, in northwestern Asia Minor [1].
Hipparchus was born in Nicaea in Bithynia, but spent much of his life in Rhodes. He is generally considered to be one of the most influential astronomers of antiquity, yet very little information available about him survives; his only extant work is his commentary on the astronomical poem of Aratus (third century B.C.), the Commentary on the Phainomena of Eudoxus and Aratus.Other works by Hipparchus (now lost) included an astronomical calendar, books on optics and arithmetic, a treatise ...
Astronomer, (fl. second half of 2nd cent. bc). His recorded observations range from 147 to 127. His only extant work, the Commentary on the Phainomena of Eudoxus and Aratus, contains criticisms of their descriptions and placings of the constellations and stars (see aratus; eudoxus ), and a list of simultaneous risings and settings.
