History of Astronomy |
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Page 20
George Forbes. once in 26,000 years in the opposite direction to the planetary revolutions . Hipparchus was also the inventor of trigonometry , both plane and spherical . He explained the method of using eclipses for determining the ...
George Forbes. once in 26,000 years in the opposite direction to the planetary revolutions . Hipparchus was also the inventor of trigonometry , both plane and spherical . He explained the method of using eclipses for determining the ...
Page 23
... revolution , the diameter of the deferent , 1 and its ratio to that of the epicycle , the distance of the excentric3 from the centre of the deferent , and the position of the 2 For definition see p . 22 . 3 For definition see p . 18 . 2 ...
... revolution , the diameter of the deferent , 1 and its ratio to that of the epicycle , the distance of the excentric3 from the centre of the deferent , and the position of the 2 For definition see p . 22 . 3 For definition see p . 18 . 2 ...
Page 27
... revolution ) , and by making it perform more than one complete revolution in a year , the added part being of the whole , he was able to include the precession of the equinoxes in his explanation of the seasons . His explanation of the ...
... revolution ) , and by making it perform more than one complete revolution in a year , the added part being of the whole , he was able to include the precession of the equinoxes in his explanation of the seasons . His explanation of the ...
Page 28
... revolution and a twenty - six thousandth part of a revolution in the sidereal year , in the opposite direction to its orbital motion . In view of this fanciful structure it must be noted , in fairness to Copernicus , that he repeatedly ...
... revolution and a twenty - six thousandth part of a revolution in the sidereal year , in the opposite direction to its orbital motion . In view of this fanciful structure it must be noted , in fairness to Copernicus , that he repeatedly ...
Page 29
... eas hypotheses esse veras , imo ne verisimiles quidem , sed sufficit hoc usum , si calculum observationibus congruentem exhibeant . " that a revolution had been effected when Pythagoras ' system THE GEOMETRICAL PERIOD . 29.
... eas hypotheses esse veras , imo ne verisimiles quidem , sed sufficit hoc usum , si calculum observationibus congruentem exhibeant . " that a revolution had been effected when Pythagoras ' system THE GEOMETRICAL PERIOD . 29.
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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