History of Astronomy |
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Page 14
... revolve round the sun , which itself revolves round an imaginary central fire called the Antichthon . Copernicus in the sixteenth century claimed Pythagoras as the founder of the system which he , Copernicus , revived . Anaxagoras ...
... revolve round the sun , which itself revolves round an imaginary central fire called the Antichthon . Copernicus in the sixteenth century claimed Pythagoras as the founder of the system which he , Copernicus , revived . Anaxagoras ...
Page 16
... revolve on its axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary deductive methods adopted by the ancient Greeks . But they went much farther in the same direction . They seem to have ...
... revolve on its axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary deductive methods adopted by the ancient Greeks . But they went much farther in the same direction . They seem to have ...
Page 22
... revolve round it once a year , and the planets each in its own period , it is only necessary to impose upon each of ... revolve in their epicycles in their own periodic times and in the deferent round the earth in a year . The major ...
... revolve round it once a year , and the planets each in its own period , it is only necessary to impose upon each of ... revolve in their epicycles in their own periodic times and in the deferent round the earth in a year . The major ...
Page 23
... revolve . The cumbrous system advocated by Ptolemy answered its purpose , enabling him to predict astronomical events approximately . He improved the lunar theory con- siderably , and discovered minor inequalities which could be allowed ...
... revolve . The cumbrous system advocated by Ptolemy answered its purpose , enabling him to predict astronomical events approximately . He improved the lunar theory con- siderably , and discovered minor inequalities which could be allowed ...
Page 25
... revolve round the sun , and to be carried with him in his annual motion round the earth . He noticed that the same supposition , if extended to Mars , Jupiter , and Saturn , would explain easily why they , and especially Mars , seem so ...
... revolve round the sun , and to be carried with him in his annual motion round the earth . He noticed that the same supposition , if extended to Mars , Jupiter , and Saturn , would explain easily why they , and especially Mars , seem so ...
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Common terms and phrases
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