| 单词 | Hipparchus |
| 例句 | Hipparchus anticipated that stars come into being, slowly move during the course of centuries and eventually perish; it was he who first catalogued the positions and magnitudes of the stars to detect such changes. Cosmos 1980-01-01T00:00:00Z The figures, from left to right, are the astronomers Hipparchus, Copernicus, an anonymous ancient observer, Brahe and Ptolemy, each surrounded by symbols of his work. The Invention of Science 2015-09-17T00:00:00Z This was in fact the method used by a Greek astronomer, Hipparchus of Nicaea, in 150 B.C. to work out the Moon’s distance from Earth. A Short History of Nearly Everything 2003-05-06T00:00:00Z The first person we know did this was Greek polymath Hipparchus, who created a star map noting the brightness of various stars more than two millennia ago. What’s the Faintest Star You Can See in the Sky? 2023-07-28T04:00:00Z Hidden beneath Christian texts, scholars have discovered what seems to be part of the long-lost star catalogue of the astronomer Hipparchus—believed to be the earliest known attempt to map the entire sky. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Hipparchus could have warned us that the dates associated with each of the natal astrology sun signs would eventually be wrong. Astronomy 2016-10-13T00:00:00Z Astronomers measure brightness by using a system called apparent magnitudes, credited to the ancient Greek polymath Hipparchus, in which larger numbers correspond to fainter objects. Satellite swarms are threatening the night sky. Is low-Earth orbit the next great crucible of environmental conflict? 2021-10-06T04:00:00Z But he was relieved that the Hipparchus manuscript seemed to have been relatively undisturbed. Do Proteins Hold the Key to the Past? 2018-11-19T05:00:00Z In light of Hipparchus and Ptolemy’s extraordinarily successful predictive theories, the goal of astronomy was to find the right combination of circles to describe the motion of the heavenly bodies around the Earth. Physics Needs Philosophy / Philosophy Needs Physics 2018-07-19T04:00:00Z Scholars have been searching for Hipparchus’s catalogue for centuries. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Almagest does not deal exclusively with Ptolemy’s own work; it includes a discussion of the astronomical achievements of the past, principally those of Hipparchus. Astronomy 2016-10-13T00:00:00Z The tablet also long predates the Greek astronomer Hipparchus, traditionally regarded as the father of trigonometry. Mathematical secrets of ancient tablet unlocked after nearly a century of study 2017-08-24T04:00:00Z “The problems are very beautiful,” the astronomer wrote, of his Hipparchus study, in 1619. Do Proteins Hold the Key to the Past? 2018-11-19T05:00:00Z It was first noticed with the naked eye in ancient Greece by the poet Araros in 260 B.C. and later by the astronomer Hipparchus in 130 B.C. This Week’s Night Sky: See Jupiter’s Colorful Clouds 2016-06-06T04:00:00Z Evans says it proves that Hipparchus, often considered the greatest astronomer of ancient Greece, really did map the heavens centuries before other known attempts. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Today, it is our main source of information about the work of Hipparchus and other Greek astronomers. Astronomy 2016-10-13T00:00:00Z A century later, Hipparchus normalized the lines of latitude, making them parallel and obedient to the earth’s geometry. Why are there 60 minutes in an hour, but only 24 hours in day? 2014-01-19T16:00:00Z After talking to Schenkel, Zilberstein had decided to test a paper that Kepler based loosely on the theories of the ancient Greek mathematician Hipparchus. Do Proteins Hold the Key to the Past? 2018-11-19T05:00:00Z His astronomical unit of 1142 Earth radii is little changed from the estimate put forth by Hipparchus of Rhodes in second century BC. The Man Who Knew Venus Would Transit the Sun [Excerpt] 2012-06-01T14:15:00.220Z Several lines of evidence point to Hipparchus as the source, beginning with the idiosyncratic way in which some of the data are expressed. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Hipparchus, not having enough data on hand to solve the problem himself, had instead amassed observational material for posterity to use. Astronomy 2016-10-13T00:00:00Z Hipparchus, whose work primarily took place between 147 and 127 B.C., proposed dividing the day into 24 equinoctial hours, based on the 12 hours of daylight and 12 hours of darkness observed on equinox days. Why are there 60 minutes in an hour, but only 24 hours in day? 2014-01-19T16:00:00Z He spent an hour going through the Hipparchus pages, looking for what he called suspicious places—marks of spittle or discoloration—on which to put the films. Do Proteins Hold the Key to the Past? 2018-11-19T05:00:00Z We have sixty divisions on the dials of our watches simply because the Greek astronomer Hipparchus, who lived in the second century B.C., accepted the Babylonian system of reckoning time, that system being sexagesimal. The Contemporary Review, Volume 36, November 1879 2012-04-25T02:01:12.830Z The researchers were able to use this to check when the ancient astronomer must have made his observations, and found that the coordinates fit roughly 129 BC—during the time when Hipparchus was working. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Hipparchus carried out many astronomical observations, making a star catalog, defining the system of stellar magnitudes, and discovering precession from the apparent shift in the position of the north celestial pole. Astronomy 2016-10-13T00:00:00Z Hipparchus and other Greek astronomers employed astronomical techniques that were previously developed by the Babylonians, who resided in Mesopotamia. Why are there 60 minutes in an hour, but only 24 hours in day? 2014-01-19T16:00:00Z Schjellerup thinks that it is very doubtful that Sirius was really red as seen by Hipparchus and Ptolemy. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z From Hipparchus that system found its way into the works of Ptolemy, about 150 A.D., and thence it was carried down the stream of civilization, finding its last resting-place on the dial-plates of our clocks. The Contemporary Review, Volume 36, November 1879 2012-04-25T02:01:12.830Z But Hipparchus was the first to define the locations of stars using two coordinates, and to map stars across the whole sky. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z How did Hipparchus discover the wobble of Earth’s axis, known as precession? Astronomy 2016-10-13T00:00:00Z Hipparchus founded trigonometry, and compiled the first table of chords. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 5 "Hinduism" to "Home, Earls of" 2012-03-25T02:00:05.717Z General The achievements of Hipparchus in astronomy were very remarkable, considering the age in which he lived. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z There is slight evidence that Apollonius of Perga may have been the originator of the system, but it was reserved for Hipparchus to work it out in final form. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z Among other things, it was Hipparchus himself who first discovered Earth’s precession, and he modelled the apparent motions of the Sun and Moon. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z As we saw Observing the Sky: The Birth of Astronomy, astronomical photometry began with Hipparchus. Astronomy 2016-10-13T00:00:00Z It is true that Hipparchus is undoubtedly a real person. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z It was then 23° 46′—as we now know by modern calculations—so that Hipparchus’ estimation was a wonderfully close approximation to the truth. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Indeed, with all that Hipparchus achieved, we need not be surprised that astronomy was regarded as a finished science, and made practically no progress whatever for centuries after his time. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z The researchers think that Hipparchus’s original list, like Ptolemy’s, would have included observations of nearly every visible star in the sky. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Hipparchus did not have a telescope or any instrument that could measure apparent brightness accurately, so he simply made estimates with his eyes. Astronomy 2016-10-13T00:00:00Z Again, the account of the Hipparchus is contradicted by Diogenes La�rtius, who says that Solon provided for the due recitation of the Homeric poems. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z In the time of Ptolemy and Hipparchus, they were still further north, and about 5000 years ago they were visible in the latitude of London. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z In the sixth book he follows mainly Hipparchus in dealing with eclipses of sun and moon. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z The relationship between Hipparchus and Ptolemy has always been murky. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Hipparchus improved this theory by placing the earth not exactly in the center of the sun's circle. Joseph Smith as Scientist A Contribution to Mormon Philosophy 2012-03-12T03:00:27.817Z The Platonic dialogue Hipparchus attributes it to Hipparchus, son of Peisistratus. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z Hipparchus’ Catalogue was revised by Ptolemy in his famous work the Almagest. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Ptolemy was an observer of the heavens, though not of the highest order; but he had all the work of his predecessors, best of all Hipparchus, to build upon. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z Some scholars have suggested that Hipparchus’s catalogue never existed. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z The great Greek philosopher, Hipparchus, after observing the movements of the heavenly bodies, suggested that the earth was not exactly in the middle of the circles. Joseph Smith as Scientist A Contribution to Mormon Philosophy 2012-03-12T03:00:27.817Z Such attempts usually start with the tacit assumption that each of the persons concerned—Lycurgus, Solon, Peisistratus, Hipparchus—must have done something for the text of Homer, or for the regulation of the rhapsodists. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z In a few cases I have found that Al-Sufi himself, although accurately describing the position of the stars observed by him, has apparently misidentified the star observed by Hipparchus and Ptolemy. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Indeed their observations of star positions were such that, in a way, they deserve the fame of having made the first catalogue, rather than Hipparchus, to whom is universally accorded that honor. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z “Many people think that Hipparchus was the truly great discoverer,” says Gysembergh, whereas Ptolemy was “an amazing teacher” who compiled his predecessors’ work. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Seeing one of their accomplices speaking to Hippias, and imagining that they were being betrayed, they prematurely attacked and slew Hipparchus alone. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 8 "Haller, Albrecht" to "Harmonium" 2012-01-02T03:00:22.443Z But if we reject it, have we any better reason for believing the parallel assertion in the Platonic Hipparchus? Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z The classical constellations of Hipparchus and Ptolemy number forty-eight, and this is the number described by Al-Sufi in his “Description of the Fixed Stars” written in the tenth century A.D. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Hipparchus was an accurate observer, and he discovered an apparent and perpetual shifting of the vernal equinox westward, by which the right ascensions of the stars are all the time increasing. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z From the data in the fragments, the team concludes that Ptolemy did not simply copy Hipparchus’s numbers. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Nor can it be determined what exactly it was that Solon and Hipparchus respectively did for the Homeric poems. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" 2011-12-05T03:00:51.527Z Thucydides notices as a popular mistake the belief that Hipparchus was the eldest son of Peisistratus, and that consequently he was the reigning “tyrant” when he was killed by Aristogiton. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z Hipparchus, Ptolemy, and Al-Sufi referred the positions of the stars to the ecliptic. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z The earliest really sturdy manifestation of astronomical life came with the birth of Greek science, culminating with Aristarchus, Hipparchus and Ptolemy. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z But perhaps he should have: Hipparchus’s observations seem to be notably more accurate, with the coordinates read so far correct to within one degree. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z His geography was based more immediately on the work of his predecessor, Marinus of Tyre, and on that of Hipparchus, the follower and critic of Eratosthenes. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z It was inevitable that later writers should speculate about the authorship of such a law, and that it should be attributed with more or less confidence to Solon or Peisistratus or Hipparchus. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z Prof. Oudemans found that the only star which could have changed in brightness by one-tenth of a magnitude since the time of Hipparchus is Aldebaran. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z In the seventh and eighth books he discusses the motion of the equinox, and embodies a catalogue of 1,028 stars, substantially as in Hipparchus. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z And whereas Ptolemy based his coordinate system on the ecliptic, Hipparchus used the celestial equator, a system more common in modern star maps. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Add to this that alterations have been avowedly introduced by the ancient astronomers themselves, among others by Ptolemy, especially in those given by Hipparchus. Astronomical Myths Based on Flammarions's History of the Heavens 2011-06-24T02:00:15.873Z The author of the Hipparchus is evidently influenced by the anti-democratical tendencies in which he only followed Plato. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z The Stars Pliny says that Hipparchus “ventured to count the stars, a work arduous even for the Deity.” Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z The appearance of a new star in the time of the Greek astronomer Hipparchus, induced him to construct his famous Catalogue of the Stars. The Plurality of Worlds 2011-06-01T02:00:23.787Z The discovery “enriches our picture” of Hipparchus, says Evans. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z It was used by Hipparchus two thousand years ago; and Ptolemy has given us a description of it. Astronomical Myths Based on Flammarions's History of the Heavens 2011-06-24T02:00:15.873Z It may even be suspected that anecdotes in praise of Peisistratus and Hipparchus were a delicate form of flattery addressed to the reigning Ptolemy. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z Among the famous men who studied in the original library of Alexandria were Strabo, Hipparchus, Archimedes, Plato, and Euclid. Cities of the Dawn 2011-05-13T02:00:10.047Z Hipparchus and other thinkers had discovered the fact of the precession of the equinoxes, though there was no adequate theory to account for it until Copernicus formulated his "motion of declination." The gradual acceptance of the Copernican theory of the universe 2011-04-03T02:00:15.847Z Hipparchus was the pivotal figure responsible for “turning astronomy into a predictive science”, agrees Ossendrijver. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Thus in the constellation of the Virgin, as drawn by Hipparchus, certain stars corresponded to the shoulders; but Ptolemy placed them in the sides, so as to make the figure a more beautiful one. Astronomical Myths Based on Flammarions's History of the Heavens 2011-06-24T02:00:15.873Z It is affected by the motions of Precession and Nutation, of which the former has been known since the time of Hipparchus. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" 2011-02-27T03:00:31.973Z It combines the planisphere and armillae of Hipparchus and others, and the theodolite of Theon, and was usually of brass, varying in diameter from a couple of inches to a foot or more. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Although Aratus was ignorant of astronomy, his poem attracted the favourable notice of distinguished specialists, such as Hipparchus, who wrote commentaries upon it. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" In his only surviving work, Hipparchus criticized earlier astronomical writers for not caring about numerical accuracy in their visions of orbits and celestial spheres. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z Aristarchus, three centuries before Christ, understood and explained the nature of eclipses; but the chief of the ancient authors upon this subject was Hipparchus. Astronomical Myths Based on Flammarions's History of the Heavens 2011-06-24T02:00:15.873Z A hundred years later Hipparchus determined more exactly the length of the solar year, and the eccentricity of the ecliptic, discovered the precession of the equinoxes, and even undertook a catalogue of the stars. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli The choice made by Hipparchus of the geocentric theory of the universe decided the future of Greek astronomy. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" On the broad steps of a temple stand Ptolemy, with the terrestrial and Hipparchus with the celestial globe. The Library and Society Reprints of Papers and Addresses With Hipparchus, this tradition merged with the Greek geometric approach, says Evans, and “modern astronomy really begins”. First Known Map of Night Sky Found Hidden in Medieval Parchment 2022-10-20T04:00:00Z He seems to have been a disciple of Hipparchus in astronomy, though he criticises and contradicts him several times in his geography. Astronomical Myths Based on Flammarions's History of the Heavens 2011-06-24T02:00:15.873Z The first instance of this in Athens was in the case of Le�na, who, after the murder of the tyrant Hipparchus, bit out her tongue rather than reveal the accomplices of her lover, Aristogiton. Greek Women An interval of 250 years elapsed before the constructive labours of Hipparchus obtained completion at Alexandria. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Era of Nabonassar.—This era is famous in astronomy, having been generally followed by Hipparchus and Ptolemy. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" It considers the precession of the equinoxes, the discovery of Hipparchus, the full period for which is twenty-five thousand years. History of the Intellectual Development of Europe, Volume I (of 2) Revised Edition One that Ptolemy was the author of was founded on data derived from ancient observers—Callipus, Democritus, Eudoxus, Hipparchus—aided by his own calculations. Astronomical Myths Based on Flammarions's History of the Heavens 2011-06-24T02:00:15.873Z In this enumeration Serpens is included in Serpentarius and Lupus in Centaurus; these two constellations were separated by Hipparchus and, later, by Ptolemy. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 2 "Constantine Pavlovich" to "Convention" Hipparchus and Ptolemy entertained the same large organic designs; they worked on similar methods; and, as the outcome, Hipparchus. their performances fitted so accurately together that between them they re-made celestial science. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Pisistratus ruled for thirty-three years, and made the Athenians content, and when he died his sons Hippias and Hipparchus ruled much as he had done, and gave no cause for complaint. Aunt Charlotte's Stories of Greek History Hipparchus also undertook to make a register of the stars by the method of alineations—that is, by indicating those which were in the same apparent straight line. History of the Intellectual Development of Europe, Volume I (of 2) Revised Edition In the first place we may notice that in the time of Hipparchus the vernal equinox was in the first degree of the Ram, from which our own arrangement has originated. Astronomical Myths Based on Flammarions's History of the Heavens 2011-06-24T02:00:15.873Z On the other hand, Aratus kept the Pleiades distinct from Taurus, but Hipparchus reduced these stars to an asterism. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 2 "Constantine Pavlovich" to "Convention" Hipparchus ranks with the Keplers and Newtons; and Copernicus was but the champion of Pythagoras. Hours in a Library New Edition, with Additions. Vol. II (of 3) But they grew proud and insolent, and one day a damsel of high family was rudely sent away from a solemn religious procession, because Hipparchus had a quarrel with her brother Harmodius. Aunt Charlotte's Stories of Greek History Neither he nor Hipparchus ever intended that theory as anything more than a geometrical fiction. History of the Intellectual Development of Europe, Volume I (of 2) Revised Edition The mathematical process of mapping a sphere onto a plane surface by stereographic projection was introduced by Hipparchus and had much influence on astronomical techniques and instruments thereafter. On the Origin of Clockwork, Perpetual Motion Devices, and the Compass We may even perceive a rational nature in men, if we refer to such examples as Plato, Aristotle, Hipparchus, Archimedes, and many others. North American Medical and Surgical Journal, Vol. 2, No. 3, July, 1826 Hipparchus is nearly a hundred miles long from north to south, and nearly ninety miles broad from east to west. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers Hipparchus had, by most sagacious interpretation of certain observations of his, discovered a remarkable phenomenon called the precession of the equinoxes. Pioneers of Science In the case of the sun and moon, Hipparchus succeeded in the application of that theory, and indicated that it might be adapted to the planets. History of the Intellectual Development of Europe, Volume I (of 2) Revised Edition The earliest known catalogue of this kind was made, as we have seen, by the celebrated Greek astronomer, Hipparchus, about the year 125 B.C. Astronomy of To-day A Popular Introduction in Non-Technical Language We shall see that Hipparchus offered this indignity to the sister of Harmodius, which extremely incensed the conspirators against the Pisistratidæ. The Ancient History of the Egyptians, Carthaginians, Assyrians, Babylonians, Medes and Persians, Macedonians and Grecians (Vol. 1 of 6) Mathematical astrology—the complex system now in vogue—involves a considerable knowledge of the apparent movements of the planets and a development of mathematics such as did not exist until the days of Hipparchus. The Astronomy of the Bible An Elementary Commentary on the Astronomical References of Holy Scripture Ever since the time of Hipparchus it had been possible for some capable man here and there to predict the occurrence of eclipses pretty closely. Pioneers of Science The quackeries of miracle-cure, shrine-cure, relic-cure, were destined to eclipse the genius of Hippocrates, and nearly two thousand years to intervene between Archimedes and Newton, nearly seventeen hundred between Hipparchus and Kepler. History of the Intellectual Development of Europe, Volume I (of 2) Revised Edition Ptolemy devoted much of his time to extending and improving the theories of Hipparchus, and compiled a great treatise, called the ‘Almagest,’ which contains nearly all the knowledge we possess of ancient astronomy. The Astronomy of Milton's 'Paradise Lost' The catalogue of Hipparchus probably, and certainly that of Tycho Brahe, some seventeen centuries later, owed each its origin to the temporary blaze of a new star. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The first catalogue of the stars of which we have record was that of Hipparchus in 129 b.c. The Astronomy of the Bible An Elementary Commentary on the Astronomical References of Holy Scripture The greatest astronomer of ancient times was Hipparchus, and to him the system known as the Ptolemaic system is no doubt largely due. Pioneers of Science The third invaluable construction was the trigonometry by which Hipparchus for the first time made a scientific astronomy possible. Progress and History We have sixty divisions on the dials of our watches simply because the Greek astronomer Hipparchus, who lived in the second century B. C., accepted the Babylonian system of reckoning time, that system being sexagesimal. Chips From A German Workshop, Vol. V. Miscellaneous Later Essays Hipparchus was killed, but Hippias escaped the danger, and seized the government himself alone. Darius the Great Makers of History A wall, built at great expense by Hipparchus, surrounded it, and Cimon planted long avenues of trees and erected fountains. Christianity and Greek Philosophy or, the relation between spontaneous and reflective thought in Greece and the positive teaching of Christ and His Apostles These discoveries of aberration and nutation, says Delambre, the great French historian of science, secure to their author a distinguished place after Hipparchus and Kepler among the astronomers of all ages and all countries. Pioneers of Science A. D. 150. followed the opinion of Hipparchus, and carried to an extreme the reaction against Eratosthenes. The Discovery of America Vol. 1 (of 2) with some account of Ancient America and the Spanish Conquest But sensual passions led to outrages which resulted in the assassination of Hipparchus. Ancient States and Empires Hipparchus's star must have been a remarkable object, for it was visible in full daylight, whence we may infer that it was many times brighter than the blazing Dog-star. Myths and Marvels of Astronomy Hippias and Hipparchus assumed the control of affairs on grounds alike of standing and of age; but Hippias, as being also naturally of a statesmanlike and shrewd disposition, was really the head of the government. The Athenian Constitution Hipparchus used the moon as an intermediary; since sun and moon are visible together, and also moon and stars. Pioneers of Science The idea seems to have originated in a guess of Hipparchus that Taprobane—the island of Ceylon, about which the most absurd reports were brought to Europe—might be the beginning of another world. The Discovery of America Vol. 1 (of 2) with some account of Ancient America and the Spanish Conquest An armillary sphere.—Sea-astrolabe, a useful graduated brass ring, with a movable index, for taking the altitude of stars and planets: it derived its name from the armillary sphere of Hipparchus, at Alexandria. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. It is interesting in the history of science, as having led Hipparchus to draw up a catalogue of stars, the first on record. Myths and Marvels of Astronomy About three years after the death of Hipparchus, finding his position in the city insecure, he set about fortifying Munichia, with the intention of establishing himself there. The Athenian Constitution Pratensis conceived that it was similar to the one observed by Hipparchus, and urged Tycho to publish the observations which he had made upon it. The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler After his death, his sons Hipparchus and Hippias succeeded him in the tyranny. Historic Tales, vol 10 (of 15) The Romance of Reality Hipparchus of Rhodes was the first to note the astronomical positions with any precision, one hundred and thirty years before our era. Astronomy for Amateurs Astronomy was immensely enriched by the discoveries of Hipparchus, who was followed by the historically more celebrated Ptolemy. Fragments of science, V. 1-2 And Hipparchus the son of Pisistratus, a little before his death, dreamt that Aphrodite threw some blood on his face out of a certain phial. Plutarch's Morals One of the tyrants, Hipparchus, was very jealous of Harmodius, because the people loved him so much. The Story of the Greeks The monotonous and quantitative work of star-cataloguing has been continued from Hipparchus, who began his work more than a century before Christ, work which is continued even to the present day. Human Traits and their Social Significance Euclid was the teacher of Mathematics, and Hipparchus of Alexandria was the father of Astronomy. Outlines of Greek and Roman Medicine Hipparchus was going to marry a common woman, but being resolved to do nothing without the advice of his friend Philander, he consulted him upon the occasion. The Art Of Writing & Speaking The English Language Word-Study and Composition & Rhetoric Plutarch assures us, that Homer was not known to the Athenians till the time of Hipparchus, about the 63d Olympiad, yet some writers make him three, some four, some five hundred years before that �ra. A New System; or, an Analysis of Antient Mythology. Volume I. Harmodius was so quick that he managed to kill Hipparchus; but, before his companions could join and protect him, he was cut down by the tyrants' guards. The Story of the Greeks Bradley, the modern Hipparchus, carried on the improvement, his errors in right ascension, according to Bessel, being under one second of time, and those of declination under four seconds of arc. Human Traits and their Social Significance Hipparchus, a hundred years after Aristotle, calculated the length of the year to within six minutes, discovered the precession of equinoxes and counted all the stars he could see, making a map of them. Little Journeys to the Homes of the Great - Volume 12 Little Journeys to the Homes of Great Scientists But we know of no one, except Aristocrates, son of Hipparchus, and a Spartan, who has affirmed that he went to Libya and Spain, and in his Indian excursions conversed with the Gymnosophists. Ideal Commonwealths The difference between glory and hard work in astronomy is just the difference between Ptolemy and Hipparchus. The Golden Censer The duties of to-day, the hopes of the future HORROCKS.—This fine ring-plain, 18 miles in diameter, stands on the N. side of the interior of Hipparchus, close to the border. The Moon A Full Description and Map of its Principal Physical Features Hipparchus, to whom the honour of it is due, gave a complete and precise statement of all the consequences which flow from this movement. Biographies of Distinguished Scientific Men At Padua he had learned to read Greek, and had become more or less familiar with Pythagoras, Hipparchus, Aristotle and Plato. Little Journeys to the Homes of the Great - Volume 12 Little Journeys to the Homes of Great Scientists Aristocrates, the son of Hipparchus, relates, that the friends of Lycurgus, with whom he sojourned, and at last died in Crete, burned his body, and, at his request, threw his ashes into the sea. Ideal Commonwealths By the family of the Ptolemies, kings of Egypt, who founded a school of astronomy at Alexandria, which produced several eminent astronomers, particularly one named Hipparchus. A Catechism of Familiar Things; Their History, and the Events Which Led to Their Discovery. With a Short Explanation of Some of the Principal Natural Phenomena. For the Use of Schools and Families. Enlarged and Revised Edition. ALBATEGNIUS.—A magnificent walled-plain, 65 miles in diameter, adjoining Hipparchus on the S., surrounded by a massive complex rampart, prominently terraced, including many depressions, and crossed by several valleys. The Moon A Full Description and Map of its Principal Physical Features Consequently, the length of the tropical year is now about ten seconds less than it was in the time of Hipparchus. Biographies of Distinguished Scientific Men Several centuries before Hipparchus was born, the Assyrian kings had in their palaces official astronomers who were able to foretell, with varying degrees of accuracy, when eclipses would take place. Myths of Babylonia and Assyria Before astronomy presented Hipparchus with the problem of solar tables, there was nothing to raise the question of the relations between lines and angles; the subject-matter of trigonometry had not been conceived. Essays on Education and Kindred Subjects Everyman's Library Another entitled Hipparchus de Religioso Negotiatore, is an attack on those of his own company; the monk turned merchant; the Jesuits were then accused of commercial traffic with the revenues of their establishment. Curiosities of Literature, Vol. 2 One of the most prominent bright craters on its border is Hipparchus G, on the W. Another, of about the same size, is Hipparchus E, on the N. of Horrocks. The Moon A Full Description and Map of its Principal Physical Features It found no favor with minds like those of Aristotle, Archimedes, Hipparchus, Ptolemy, or any of the acute and learned Arabian or mediæval astronomers. The Uses of Astronomy An Oration Delivered at Albany on the 28th of July, 1856 No. I sought him; but I heard that he was private, None with him but Hipparchus, his freedman. The works of John Dryden, now first collected in eighteen volumes. Volume 05 Further, the reduction of the doctrine of the sphere to the quantitative form needed for astronomical purposes, required the formation of a spherical trigonometry, which was also achieved by Hipparchus. Essays on Education and Kindred Subjects Everyman's Library Five of these—all eclipses of the moon—were described by Hipparchus from Babylonian sources, and are found to answer all the requirements of modern science. The Seven Great Monarchies Of The Ancient Eastern World, Vol 4. (of 7): Babylon The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations. Hipparchus counted one thousand and twenty-two; Ptolemy one thousand and twenty-six; and it is easy to number those visible to the naked eye. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work The first serious attempts to carry further the unfinished work of Archimedes, Hipparchus, and Ptolemy, of Aristotle and of Galen, naturally enough arose among the astronomers and the physicians. The Advance of Science in the Last Half-Century When Asklepiades, the son of Hipparchus, first brought the news of Alexander's death to Athens, Demades advised the people not to believe it. Plutarch's Lives Volume III. Hipparchus, before making his solar and lunar tables, had to discover rules for calculating the relations between the sides and angles of triangles—trigonometry a subdivision of pure mathematics. Essays on Education and Kindred Subjects Everyman's Library Thus Ptolemy grew out of Hipparchus, Copernicus out of both, Kepler out of all three, and Newton out of all the four. Six Lectures on Light Delivered In The United States In 1872-1873 Such is a brief sketch of the advantages which geography, as founded on astronomy, derived from the labours of Hipparchus. A General History and Collection of Voyages and Travels - Volume 18 Historical Sketch of the Progress of Discovery, Navigation, and Commerce, from the Earliest Records to the Beginning of the Nineteenth Century, By William Stevenson Lastly, Hipparchus, 200 years before the Christian era, discovered some inequalities in the apparent movements of the earth's satellite. The Moon-Voyage The result was that no one was ever again ostracised at Athens, but Hyperbolus was the last, as Hipparchus of Cholargus, who was some relation to the despot of that name, was the first. Plutarch's Lives Volume III. Like his father Pisistratus, Hipparchus endeavored to further the cause of letters by calling poets to his court. Library of the World's Best Literature, Ancient and Modern — Volume 2 For Hipparchus had been slain by Harmodius and Aristogiton, and afterwards Hippias would hardly have been expelled but that his enemies captured his children and so could make with him what terms they chose. The World's Greatest Books — Volume 11 — Ancient and Mediæval History Hipparchus can scarcely receive too high praise: he has proved, more satisfactorily than any other philosopher, that man is allied to heaven, and his soul derived from on high. A General History and Collection of Voyages and Travels - Volume 18 Historical Sketch of the Progress of Discovery, Navigation, and Commerce, from the Earliest Records to the Beginning of the Nineteenth Century, By William Stevenson He was set by the side of Hipparchus, of Galileo, Copernicus, Kepler, and Sir Isaac Newton. The Last Leaf Observations, during Seventy-Five Years, of Men and Events in America and Europe Of the two methods of expression Hipparchus ultimately preferred the second. Kepler When he was a lad of eleven, the tyrant Hipparchus fell in a public street of Athens under the daggers of Harmodius and Aristogeiton. Library of the World's Best Literature, Ancient and Modern — Volume 1 Hipparchus, ancient astronomer, born at Nicæa; flourished in the 2nd century B.C.; discovered among other things the precession of the equinoxes, determined the place of the equinox, and catalogued 1000 fixed stars. The Nuttall Encyclopædia Being a Concise and Comprehensive Dictionary of General Knowledge The next person belonging to the Alexandrian school, to whom the sciences on which geography rest, as well as geography itself, is greatly indebted, was Hipparchus. A General History and Collection of Voyages and Travels - Volume 18 Historical Sketch of the Progress of Discovery, Navigation, and Commerce, from the Earliest Records to the Beginning of the Nineteenth Century, By William Stevenson Hipparchus being passionately fond of his own Wife who was enamoured of Bathyllus, leaped, and died of his Fall; upon which his Wife married her Gallant. The Spectator, Volume 2. He made no advance on Hipparchus in regard to the sun, though the lapse of time had largely increased the errors of the elements adopted by the latter. Kepler Hilarion: Are you that learned little Psyche, who At dinner parties, brought in to dessert, Would tackle visitors with "You don't know Who first determined longitude — I do — Hipparchus 'twas — B. C. one sixty-three!" The Complete Plays of Gilbert and Sullivan This Theophilus was the father of Hipparchus, who had such interest with Antony, who was the first of all his freedmen that went over to Caesar, and who settled afterwards at Corinth. Plutarch: Lives of the noble Grecians and Romans As history does not inform us of any other person of note of this name, a native of Nice in Bithynia, it is highly probable that this was the Hipparchus, the astronomer and geographer. A General History and Collection of Voyages and Travels - Volume 18 Historical Sketch of the Progress of Discovery, Navigation, and Commerce, from the Earliest Records to the Beginning of the Nineteenth Century, By William Stevenson According to Hipparchus and Ptolemy, the equinoxes preceded at the rate of a degree in 100 years, or 36,000 hundred years in 360 degrees. The God-Idea of the Ancients or Sex in Religion No advance was made in theoretical astronomy for 260 years, the interval between Hipparchus and Ptolemy of Alexandria. Kepler A wall built round the Academia by Hipparchus was so expensive that it became a proverb applied to all costly undertakings. Philothea A Grecian Romance And, in fact, none ever afterwards suffered this sort of punishment, but Hyperbolus was the last, as Hipparchus the Cholargian, who was kin to the tyrant, was the first. Plutarch: Lives of the noble Grecians and Romans The irregularities exhibited in the lunar motions had been known in the time of Hipparchus and Ptolemy. The Great Events by Famous Historians, Volume 12 Suddenly, running round the dovecote, came A young man naked, breathless, through the dawn, Florid with haste and wine; it was Hipparchus. Georgian Poetry 1911-12 In the case of the moon, however, Ptolemy traced the variable inequality noticed sometimes by Hipparchus at first and last quarter, which vanished when the moon was in apogee or perigee. Kepler Dear lady," replied Milza, "Alcibiades demands such an immense sum for the ivory, that he says he might as well undertake to build the wall of Hipparchus, as to pay it. Philothea A Grecian Romance Hipparchus, error of, in respect of Africa, and India. The Life and Voyages of Christopher Columbus (Volume II) Hipparchus sent a barge for him; the poet readily embraced the invitation, and the Muses and the Loves were wafted with him to Athens. The Complete Poems of Sir Thomas Moore Collected by Himself with Explanatory Notes He towed Hipparchus back like one he'd saved From drowning, laid him out upon that ledge Where late Amyntas stood, where now he kneeled Shivering, alarmed and mute. Georgian Poetry 1911-12 New Stars.—Extreme instances of variable stars are the new stars such as those detected by Hipparchus, Tycho Brahe, and Kepler, of which many have been found in the last half-century. History of Astronomy Mathematics were splendidly represented by Euclid and Archimedes, Geography by Eratosthenes, Astronomy by Hipparchus; for these men, though not all residents in Alexandria, all gained their principles and method from study within her walls. The History of Roman Literature From the earliest period to the death of Marcus Aurelius The opinion that the Indian Sea joined the ocean was admitted among the Greeks, and in the school of Alexandria, until the time of Hipparchus. The Life and Voyages of Christopher Columbus (Volume II) He flourished at that remarkable period when, under the polished tyrants Hipparchus and Polycrates, Athens and Samos were become the rival asylums of genius. The Complete Poems of Sir Thomas Moore Collected by Himself with Explanatory Notes He smiled And watched Hipparchus spit and cough and groan. Georgian Poetry 1911-12 So Ptolemy was dependent upon Hipparchus, Kepler on Tycho Brahe, and Newton in much of his work upon Flamsteed. History of Astronomy In the meantime Hipparchus, after a second solicitation of Harmodius, attended with no better success, unwilling to use violence, arranged to insult him in some covert way. The History of the Peloponnesian War These did not require such marvellous mathematical powers as made Kepler and Newton immortal,--the equals of Ptolemy and Hipparchus in mathematical demonstration,--but only accuracy and perseverance in observations. Beacon Lights of History, Volume 06 Renaissance and Reformation Hipparchus, who now maintained at Athens the power which his father Pisistratus had usurped, was one of those princes who may be said to have polished the fetters of their subjects. The Complete Poems of Sir Thomas Moore Collected by Himself with Explanatory Notes Each slope grew steeper till I left my seat And led the mule; for now Hipparchus' snore Tuned with the crooning waves heard from below. Georgian Poetry 1911-12 Hipparchus, having compared his own observations with those of more ancient astronomers, supplied an accurate value of the moon’s mean motion in his time. History of Astronomy Pisistratus dying at an advanced age in possession of the tyranny, was succeeded by his eldest son, Hippias, and not Hipparchus, as is vulgarly believed. The History of the Peloponnesian War Astronomical science received a great impulse from the school of Alexandria, the greatest light of which was Hipparchus, who flourished early in the second century before Christ. Beacon Lights of History, Volume 03 Ancient Achievements Eratosthenes, Archimedes, and Hipparchus were geniuses worthy to be placed by the side of Kepler, Newton, and La Place. The Old Roman World, : the Grandeur and Failure of Its Civilization. Spluttering Amyntas rose, Hipparchus near him Who cried 'Why coy of kisses, lovely lad? Georgian Poetry 1911-12 We may look upon these epicycles of Apollonius, and the excentric of Hipparchus, as the responses of these astronomers to the demand of Plato for uniform circular motions. History of Astronomy It was the sad fate which made Hipparchus famous that got him also the credit with posterity of having been tyrant. The History of the Peloponnesian War Hipparchus was the first who raised geography to the rank of a science. Beacon Lights of History, Volume 03 Ancient Achievements But the great light of this school was Hipparchus, whose lifetime extended from 190 to 120 years B.C. The Old Roman World, : the Grandeur and Failure of Its Civilization. That chance which left Hipparchus with no clothes, Surely divinity was ambushed in it? Georgian Poetry 1911-12 Ulugh Begh, grandson of the great Tamerlane the Tartar, built a fine observatory at Samarcand in the fifteenth century, and made a great catalogue of stars, the first since the time of Hipparchus. History of Astronomy Hipparchus, who flourished about the middle of the second century B.C., was, through his careful observations, the real founder of scientific astronomy. General History for Colleges and High Schools Hipparchus also framed a catalogue of the stars, and determined their places with reference to the ecliptic by their latitudes and longitudes. Beacon Lights of History, Volume 03 Ancient Achievements Hipparchus framed a catalogue of the stars, and determined their places with reference to the ecliptic, by their latitudes and longitudes. The Old Roman World, : the Grandeur and Failure of Its Civilization. Great Zeus, Hipparchus had so turned his head, His every smile and word As we sat by our fire, stung my fool's heart.— Georgian Poetry 1911-12 Tycho Brahe, a Dane, born in 1546 of noble parents, was the most distinguished, diligent, and accurate observer of the heavens since the days of Hipparchus, 1,700 years before. History of Astronomy Hipparchus, having insulted a young noble, was assassinated. General History for Colleges and High Schools Eratosthenes, Archimedes, and Hipparchus were geniuses worthy to be placed by the side of Kepler, Newton, and La Place, and all ages will reverence their efforts and their memory. Beacon Lights of History, Volume 03 Ancient Achievements Hipparchus introduced into geography a great improvement, namely, the relative situation of places, by the same process that he determined the positions of the heavenly bodies. The Old Roman World, : the Grandeur and Failure of Its Civilization. And Hipparchus was content; but when they repaired to the Demosion to exchange the price for the deed, Hippocrates was unable to produce any parchment showing his title to the vale. The Inhumanity of Socialism Hipparchus was also the inventor of trigonometry, both plane and spherical. History of Astronomy The astronomer of to-day may look back upon Hipparchus and Ptolemy as the earliest ancestors of whom he has positive knowledge. Side-Lights on Astronomy and Kindred Fields of Popular Science Hipparchus of Bithynia, an astronomer of the 2nd century B.C., Meditations Hipparchus was the first among the Greeks who observed some change in the constellations with regard to the equinoxes, or rather who learnt it from the Egyptians. Letters on England The next day, we all, meeting at the house of Phidias, fell to debating whether Hippocrates owned the land and could sell it to Hipparchus. The Inhumanity of Socialism In connection with Hipparchus’ great discovery it may be mentioned that modern astronomers have often attempted to fix dates in history by the effects of precession of the equinoxes. History of Astronomy Should this come about there will be a few—Hipparchus and Ptolemy, Copernicus and Newton, Galileo and Herschel—to be surrounded by admiring crowds. Side-Lights on Astronomy and Kindred Fields of Popular Science The most famous name in the science of this period is that of Hipparchus who lived and worked at Rhodes about the year 160BC. Great Astronomers He lived many years at Athens, both at the court of Hipparchus, together with Anacreon, and subsequently under the democracy during the Persian wars. A Smaller history of Greece From the earliest times to the Roman conquest PHAEDO—That is certainly true, and I do not doubt that Hipparchus will now pay down his talent of silver and take over the vale in the Olympian forest. The Inhumanity of Socialism He actually calculated the amount; and so he explained the cause of the precession of the equinoxes discovered by Hipparchus about 150 B.C. History of Astronomy No. I sought him; but I heard that he was private, None with him but Hipparchus, his freedman. All for Love Or, the World Well Lost A Tragedy The ingenuity of Hipparchus enabled him to determine the positions of each of the two equinoxes relatively to the stars which lie in its immediate vicinity. Great Astronomers He spent part of his life at Samos, under the patronage of Polycrates; and after the death of this despot he went to Athens at the invitation of Hipparchus. A Smaller history of Greece From the earliest times to the Roman conquest And when he was unable to do that, Hipparchus would not pay down his silver, until he could make further inquiry. The Inhumanity of Socialism Furthermore, either system could use the excentric of Hipparchus to explain the irregular motion known as the equation of the centre. History of Astronomy The sages Eratosthenes, Hipparchus and Ptolemy amplified the teaching. The Path of the King From the days of Hipparchus down to the present hour the science of astronomy has steadily grown. Great Astronomers Believing that they were betrayed, they rushed back into the city with their daggers hid in the myrtle boughs which they were to have carried in the procession, and killed Hipparchus. A Smaller history of Greece From the earliest times to the Roman conquest Indeed, he was easily the greatest observing astronomer since Hipparchus, between whom and himself there were many points of resemblance. A History of Science — Volume 2 Yet more remarkable, because of the greater difficulties involved, was Hipparchus's attempt to measure the actual distance of the moon. A History of Science — Volume 1 These did not require such marvellous mathematical powers as made Kepler and Newton immortal,—the equals of Ptolemy and Hipparchus in mathematical demonstration—but only accuracy and perseverance in observations. Beacon Lights of History But the discovery which shows, beyond all others, that Hipparchus possessed one of the master-minds of all time was the detection of that remarkable celestial movement known as the precession of the equinoxes. Great Astronomers He transmitted the sovereign power to his sons, Hippias and Hipparchus, who conducted the government on the same principles as their father. A Smaller history of Greece From the earliest times to the Roman conquest The appearance of a new star was a phenomenon not unknown to the ancients, since Pliny records that Hipparchus was led by such an appearance to make his catalogue of the fixed stars. A History of Science — Volume 2 Modern commentators have defended Pytheas as regards this observation, claiming that it was Hipparchus and not Pytheas who made the second observation from which the faulty induction was drawn. A History of Science — Volume 1 Four names at once attract us: Euclid, Aristarchus, Eratosthenes, Hipparchus. Alexandria and Her Schools; four lectures delivered at the Philosophical Institution, Edinburgh In any investigation of the celestial movements the positions of these two equinoxes on the heavens are of primary importance, and Hipparchus, with the instinct of genius, perceived their significance, and commenced to study them. Great Astronomers It was to those of the latter on Spica Virginis that Hipparchus was indebted for his great discovery of the precession of the eqninoxes. History of the Conflict Between Religion and Science In making these studies of the relative position of the stars, Hipparchus was led to compare his observations with those of the Babylonians, which, it was said, Alexander had caused to be transmitted to Greece. A History of Science — Volume 1 With Aristarchus the scientific imagination had reached its highest flight; but with Hipparchus it was beginning to settle back into regions of foggier atmosphere and narrower horizons. A History of Science — Volume 1 As you will hear presently, the discoveries of Archimedes and Hipparchus were allowed to remain where they were for centuries. Alexandria and Her Schools; four lectures delivered at the Philosophical Institution, Edinburgh Hipparchus traced out this phenomenon, and established it on an impregnable basis, so that all astronomers have ever since recognised the precession of the equinoxes as one of the fundamental facts of astronomy. Great Astronomers Hipparchus also determined the first inequality of the moon, the equation of the centre. History of the Conflict Between Religion and Science Hipparchus, at a later day, was enabled to compare his own observations with those made by Aristarchus, and, as we have just seen, his work was well known to so distant a contemporary as Archimedes. A History of Science — Volume 1 In other words, Hipparchus might have measured the distance of the sun in stadia. A History of Science — Volume 1 I mean, of course, the famous Ptolemy, whose name so long bore the honour of that system which really belonged to Hipparchus. Alexandria and Her Schools; four lectures delivered at the Philosophical Institution, Edinburgh Not until nearly two thousand years after Hipparchus had made this splendid discovery was the explanation of its cause given by Newton. Great Astronomers It considers the precession of the equinoxes, the discovery of Hipparchus, the full period of which is twenty-five thousand years. History of the Conflict Between Religion and Science It was Hipparchus whose somewhat equivocal comment on the work of Eratosthenes we have already noted. A History of Science — Volume 1 But all this, of course, detracts nothing from the merits of Hipparchus as an observing astronomer. A History of Science — Volume 1 Four men only among them seem, as far as I can judge, to have had a great inductive power: Socrates and Plato in Metaphysics; Archimedes and Hipparchus in Physics. Alexandria and Her Schools; four lectures delivered at the Philosophical Institution, Edinburgh We shall commence with Ptolemy, who, after the foundations of the science had been laid by Hipparchus, gave to astronomy the form in which it was taught throughout the Middle Ages. Great Astronomers The names of Hipparchus, of Apollonius, of Ptolemy, of Archimedes, will be mentioned with reverence by men of every religious profession, as long as there are men to speak. History of the Conflict Between Religion and Science No scientific progress is possible without scientific guessing, but Hipparchus belonged to that class of observers with whom hypothesis is held rigidly subservient to fact. A History of Science — Volume 1 We do not know that Hipparchus attempted to explain it, but he was led to make a chart of the heavens, probably with the idea of guiding future observers in the observation of new stars. A History of Science — Volume 1 But we must leave Archimedes for a man not perhaps so well known, but to whom we owe as much as to the great Syracusan—Hipparchus the astronomer. Alexandria and Her Schools; four lectures delivered at the Philosophical Institution, Edinburgh Hipparchus had the gnomon of Eratosthenes—doubtless in a perfected form—to aid him, and he soon proved himself a master in its use. A History of Science — Volume 1 Strabo goes on to say that in common with other critics, including Hipparchus, he regards Homer as the first great geographer. A History of Science — Volume 1 Hipparchus said of him, perhaps half jestingly, that he had studied astronomy as a geographer and geography as an astronomer. A History of Science — Volume 1 In the field of astronomy, his great service was to have made known to the world the labors of Hipparchus. A History of Science — Volume 1 The moon in particular received most careful attention from Hipparchus. A History of Science — Volume 1 The idea of such an explanation did not originate with Hipparchus. A History of Science — Volume 1 Ptolemy's book, as has been said, is virtually an elaboration of the doctrines of Hipparchus. A History of Science — Volume 1 This theory was, of course, but an elaboration of the ideas of Hipparchus; but, owing to the celebrity of the expositor, it has come to be spoken of as the theory of Ptolemy. A History of Science — Volume 1 Indeed, his work might almost be called an exposition of the astronomical doctrines of Hipparchus. A History of Science — Volume 1 It is believed that Eratosthenes invented an important modification of the gnomon which was elaborated afterwards by Hipparchus and called an armillary sphere. A History of Science — Volume 1 Hipparchus was born at Nicaea, in Bithynia, in the year 160 B.C. A History of Science — Volume 1 Hipparchus must have known of that measurement, since he quotes the work of Aristarchus in other fields. A History of Science — Volume 1 A misinterpretation of Ptolemy's writings led to the idea that Hipparchus, performed his chief labors in Alexandria, but it is now admitted that there is no evidence for this. A History of Science — Volume 1 We have sufficiently detailed the theory in speaking of Hipparchus. A History of Science — Volume 1 Delambre doubted, and most subsequent writers follow him here, whether Hipparchus ever so much as visited Alexandria. A History of Science — Volume 1 Here again Hipparchus was not altogether an innovator, since a chart showing the brightest stars had been made by Eratosthenes; but the new charts were much elaborated. A History of Science — Volume 1 A further service was rendered theoretical astronomy by Hipparchus through his invention of the planosphere, an instrument for the representation of the mechanism of the heavens. A History of Science — Volume 1 All in all, then, Hipparchus is a most heroic figure. A History of Science — Volume 1 The studies of Hipparchus led him to observe the stars chiefly with reference to the meridian rather than with reference to their rising, as had hitherto been the custom. A History of Science — Volume 1 As our eye falls upon Asia Minor and its outlying islands, we reflect that here were born such men as Thales, Anaximander, Anaximenes, Heraclitus, Pythagoras, Anaxagoras, Socrates, Aristarchus, Hipparchus, Eudoxus, Philolaus, and Galen. A History of Science — Volume 1 |
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