History of Astronomy |
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Page 15
... spheres , twenty - six revolving spheres in all , the motion of each planet being resolved into its components , and a separate sphere being assigned for each component motion . Callippus ( 330 B.C. ) increased the number THE ...
... spheres , twenty - six revolving spheres in all , the motion of each planet being resolved into its components , and a separate sphere being assigned for each component motion . Callippus ( 330 B.C. ) increased the number THE ...
Page 16
... spheres was not suggested , but the idea was only a mathematical conception to facilitate the construction of tables ... sphere , and there was no reason why it should incline one way rather than another . Empedocles attributed its state ...
... spheres was not suggested , but the idea was only a mathematical conception to facilitate the construction of tables ... sphere , and there was no reason why it should incline one way rather than another . Empedocles attributed its state ...
Page 20
... spherical . He explained the method of using eclipses for determining the longitude . In connection with Hipparchus ' great discovery it may be mentioned that modern astronomers have often attempted to fix dates in history by the ...
... spherical . He explained the method of using eclipses for determining the longitude . In connection with Hipparchus ' great discovery it may be mentioned that modern astronomers have often attempted to fix dates in history by the ...
Page 26
... spherical because the sphere is , of all figures , the most perfect ” ( Delambre , Ast . Mod . Hist . , pp . 86 , 87 ) . 2 Kepler tells us that Tycho Brahe was pleased with this device , and adapted it to his own system . by Copernicus ...
... spherical because the sphere is , of all figures , the most perfect ” ( Delambre , Ast . Mod . Hist . , pp . 86 , 87 ) . 2 Kepler tells us that Tycho Brahe was pleased with this device , and adapted it to his own system . by Copernicus ...
Page 30
... impression is made that the jointed bars there spoken of for describing the circles were supposed to be real . This is no more the case than that the spheres of Eudoxus and Callippus were supposed 30 THE GEOMETRICAL PERIOD.
... impression is made that the jointed bars there spoken of for describing the circles were supposed to be real . This is no more the case than that the spheres of Eudoxus and Callippus were supposed 30 THE GEOMETRICAL PERIOD.
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accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later LIBRARIES light lunar Mars mass mathematical mean measured method miles moon moon's motion move Newton noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed SIGILLUM solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY VERITAS