History of Astronomy |
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Page 18
... excentric . The line from the earth to the excentric " was called the line of apses . A circle having this centre was called the equant , and he supposed that a radius drawn to the sun from the excentric passes over equal arcs on the ...
... excentric . The line from the earth to the excentric " was called the line of apses . A circle having this centre was called the equant , and he supposed that a radius drawn to the sun from the excentric passes over equal arcs on the ...
Page 19
... excentric as he had done the sun's . He also discovered some of the minor irregularities of the moon's motion , due , as Newton's theory proves , to the disturbing action of the sun's attraction . In the year 134 B.C. Hipparchus ...
... excentric as he had done the sun's . He also discovered some of the minor irregularities of the moon's motion , due , as Newton's theory proves , to the disturbing action of the sun's attraction . In the year 134 B.C. Hipparchus ...
Page 21
... in the Camb . Phil . Soc . Proc . , vol . iv . , pt . ii . , p . 93 , on whose authority the above statements are made . 3 See p . 6 for definition . of the universe . He adopted the excentric and equant THE GEOMETRICAL PERIOD 21.
... in the Camb . Phil . Soc . Proc . , vol . iv . , pt . ii . , p . 93 , on whose authority the above statements are made . 3 See p . 6 for definition . of the universe . He adopted the excentric and equant THE GEOMETRICAL PERIOD 21.
Page 22
... excentric . Ptolemy supposed the centres of the epicycles of Mercury and Venus to be on a bar passing through the sun , and to be between the earth and the sun . The centres of the epicycles of Mars , Jupiter , and Saturn were supposed ...
... excentric . Ptolemy supposed the centres of the epicycles of Mercury and Venus to be on a bar passing through the sun , and to be between the earth and the sun . The centres of the epicycles of Mars , Jupiter , and Saturn were supposed ...
Page 23
... excentric of Hipparchus , as the responses of these astronomers to the demand of Plato for uniform circular motions . Their use became more and more confirmed , until_the_seventeenth century , when the accurate observations of Tycho ...
... excentric of Hipparchus , as the responses of these astronomers to the demand of Plato for uniform circular motions . Their use became more and more confirmed , until_the_seventeenth century , when the accurate observations of Tycho ...
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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