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Page viii
... hypotheses as true , have founded upon these discoveries a science as exact in its observation of facts as in theories . So it is that these men , who have built up the most sure and most solid of all the sciences , refuse to invite ...
... hypotheses as true , have founded upon these discoveries a science as exact in its observation of facts as in theories . So it is that these men , who have built up the most sure and most solid of all the sciences , refuse to invite ...
Page ix
... hypotheses of many well- known astronomers of to - day cannot be included among the records of the History of Astronomy . The writer regrets the necessity that thus arises of leaving without mention the names of many who are now making ...
... hypotheses of many well- known astronomers of to - day cannot be included among the records of the History of Astronomy . The writer regrets the necessity that thus arises of leaving without mention the names of many who are now making ...
Page 28
... , historiam motuum cœlestium diligenti et artificiosa observatione colligere . Deinde causas earundem , seu hypotheses , cum veras assequi nulla ratione says that whoever is not satisfied with this explanation must 28 THE GEOMETRICAL ...
... , historiam motuum cœlestium diligenti et artificiosa observatione colligere . Deinde causas earundem , seu hypotheses , cum veras assequi nulla ratione says that whoever is not satisfied with this explanation must 28 THE GEOMETRICAL ...
Page 29
... 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.
... 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.
Page 38
... hypothesis he used a modification of an old Egyptian theory , mathematically identical with that of Copernicus , but not involving a stellar parallax . He says ( De Mundi , etc. ) that the Ptolemean system was too complicated , and the ...
... hypothesis he used a modification of an old Egyptian theory , mathematically identical with that of Copernicus , but not involving a stellar parallax . He says ( De Mundi , etc. ) that the Ptolemean system was too complicated , and the ...
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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