History of Astronomy |
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Page 18
... computed tables for predicting the place of the sun . He proceeded in the same way to compute Lunar tables . Making use of Chaldæan eclipses , he was able to get an accurate value of the moon's mean motion 18 THE GEOMETRICAL PERIOD.
... computed tables for predicting the place of the sun . He proceeded in the same way to compute Lunar tables . Making use of Chaldæan eclipses , he was able to get an accurate value of the moon's mean motion 18 THE GEOMETRICAL PERIOD.
Page 28
... compute tables from which the places of the planets among the stars can be predicted.1 He " Est enim Astronomi proprium , historiam motuum cœlestium diligenti et artificiosa observatione colligere . Deinde causas earundem , seu ...
... compute tables from which the places of the planets among the stars can be predicted.1 He " Est enim Astronomi proprium , historiam motuum cœlestium diligenti et artificiosa observatione colligere . Deinde causas earundem , seu ...
Page 60
... compute a lunar eclipse observed in Babylon 721 B.C. , another at Alexandria 201 B.C. , a solar eclipse observed by Theon 360 A.D. , and two later ones up to the tenth century . He found that to explain these eclipses Halley's sug ...
... compute a lunar eclipse observed in Babylon 721 B.C. , another at Alexandria 201 B.C. , a solar eclipse observed by Theon 360 A.D. , and two later ones up to the tenth century . He found that to explain these eclipses Halley's sug ...
Page 61
... computed the amount at 10 " in one century , agreeing with observation . ( Later on Adams showed that Laplace's calculation was wrong , and that the value he found was too large ; so , part of the acceleration is now attributed by some ...
... computed the amount at 10 " in one century , agreeing with observation . ( Later on Adams showed that Laplace's calculation was wrong , and that the value he found was too large ; so , part of the acceleration is now attributed by some ...
Page 62
... computed their parabolic orbits by the rules laid down by Newton . His object was to find out if any of them really travelled in elongated ellipses , practically undistinguishable , in the visible part of their paths , from parabolæ ...
... computed their parabolic orbits by the rules laid down by Newton . His object was to find out if any of them really travelled in elongated ellipses , practically undistinguishable , in the visible part of their paths , from parabolæ ...
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Common terms and phrases
accurate observations Airy astro Astronomer Royal Astronomia Nova astronomical units attraction axis bright calculations Cape Cassini catalogue centre century comet compute Copernicus diameter discovered discovery earth eclipse epicycles equatoreal error excentric explain fact fixed stars Galileo Greenwich Halley heavenly bodies heavens heliometer Hipparchus Huggins hydrogen hypothesis instruments Johann Kepler John Herschel Jupiter Jupiter's Kepler Laplace Lick Observatory light line of apses line of sight lunar Mars mathematical mean distance mean motion measured Mercury meteor method miles a second moon moon's nebulæ Newton Observatory orbit parallax perihelion period photographic physical planet planetary pole position predicted proper motion proved Ptolemy R. S. Phil records refractor retrograde retrograde motion revolution revolve round ring rotation round the sun satellites seems showed Sirius solar system spectra spectroscope spectrum spots stellar sun-spots sun's surface supposed tables telescope theory tion Trans Tycho Brahe Uranus velocity Venus Verrier zenith