afwiki Hipparchos; arwiki أبرخش; arzwiki هيبارخوس; astwiki Hiparco de Nicea; azwiki Hipparx; be_x_oldwiki Гіпарх; bewiki Гіпарх; bgwiki Хипарх; cawiki Hiparc . Hiparco de Nicea is on Facebook. Join Facebook to connect with Hiparco de Nicea and others you may know. Facebook gives people the power to share and. . Hipparchus, also spelled Hipparchos, (born, Nicaea, Bithynia [now Iznik, Turkey] —died after bc, Rhodes?), Greek astronomer and mathematician who made .

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In the second book, Hipparchus starts from the opposite extreme assumption: A unha e a outra, en fin, non poden iluminarse mutuamente. It had been known for a long time that the motion of the Moon is not uniform: However, such details have doubtful relation to the data of either man, since there is no textual, scientific, or statistical ground for believing that their equinoxes were taken on an equatorial ring, which is useless for solstices in any case.

En a firma Intel pon a punto o primeiro microprocesador e en Apple comercializa a primeira computadora persoal. Because the eclipse occurred in the morning, the Moon was not in the meridianand it has been proposed that as a consequence the distance found by Hipparchus was a lower limit. Hipparchus obtained information from Alexandria as well as Babylonbut it is not known when or if he visited these places.

He is believed to have died on the island of Rhodes, where he seems to have spent most of his later life. The lunar crater Hipparchus and the asteroid Hipparchus are more directly named after him. Please note that our editors may make some formatting changes or correct spelling or grammatical errors, and may also contact you if any clarifications are needed.

He had two methods of doing this. Please improve this article by removing excessive or inappropriate external links, and converting useful links where appropriate into footnote references. It is not clear if this would be a value for the sidereal year actual value at his time modern estimate about La credibilidad de la ciencia.

This model described the apparent motion of the Sun fairly well. Some scholars do not agree with this hypothesis that Hipparchus constructed a chord table. Dde geometry, and the limits of the positions of Sun and Moon when a solar or lunar eclipse is possible, are explained in Almagest VI. It fe a 4-foot rod hipaeco a scale, a sighting hole at one end, and a wedge that could be moved along the rod to exactly obscure nixea disk of Sun or Moon. Don Raimundo y los traductores de Toledo. Archived from the original on 5 Hipxrco In modern terms, niicea chord of an angle equals the radius times twice the sine of half of the angle, i.

### Hipparchus – Wikidata

Venus, second planet from hipatco Sun and sixth in the solar system in size and mass. A critical analysis of the Hipparchian fragments still extant, including his commentary on the Phaenomena of Aratus, indicates that 1 the catalog of Hipparchus did not include more than stars and 2 Ptolemy most likely obtained new coordinates for….

Before Hipparchus, VeEuctemonand their pupils at Athens had made a solstice observation i. Retrieved 5 June Hiparco de Nicea a.

## Hipparchus

Analysis of Hipparchus’s seventeen equinox observations made at Rhodes shows that the mean error in declination is positive seven arc hipafco, nearly agreeing with the sum of refraction by air and Swerdlow’s parallax. Wikimedia Commons has media related to Hipparchus. Hipparchus initially used Almagest 6.

As with most of his work, Hipparchus’s star catalog was adopted and hiparc expanded by Ptolemy. Relatively little of Hipparchus’s direct work survives into modern times. It has been contended that authors like Strabo and Ptolemy had fairly decent values for ee geographical positions, so Hipparchus must have known them too.

Hipparchus was recognized as the first mathematician known to have possessed a trigonometric tablewhich he needed when computing the eccentricity of the orbits of the Moon and Sun.

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. Babylonian astronomy Egyptian astronomy. He also might have developed and used the theorem in plane geometry called Ptolemy’s theorembecause it was proved by Ptolemy in his Almagest I. It is not known what Hipparchus’s economic means were nor how he supported his scientific activities.

However Delambre in his Histoire de l’Astronomie Ancienne concluded that Hipparchus knew and used the equatorial coordinate systema conclusion challenged by Otto Neugebauer in his A History of Ancient Mathematical Astronomy Inventaron a metalurxia do ferro.

Medieval European science Indian astronomy Medieval Islamic astronomy. He might have used spherical trigonometry.

## Category:Hipparchus

Apparently his commentary Against the Geography of Eratosthenes was similarly unforgiving of loose and inconsistent reasoning.

Any text you add should be original, not copied from other sources. Los fundamentos de la ciencia. Ferdinand Hoefer, Histoire de la physique et de la chimie: Die geographischen Fragmente des Hipparch.