History of Astronomy |
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Page 18
... 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 equant in equal ...
... 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 equant in equal ...
Page 23
... the position of the 2 For definition see p . 22 . 3 For definition see p . 18 . 2 Ibid . I line of apses , besides the inclination and position THE GEOMETRICAL PERIOD 23 THE REIGN OF EPICYCLES - FROM PTOLEMY TO COPERNICUS.
... the position of the 2 For definition see p . 22 . 3 For definition see p . 18 . 2 Ibid . I line of apses , besides the inclination and position THE GEOMETRICAL PERIOD 23 THE REIGN OF EPICYCLES - FROM PTOLEMY TO COPERNICUS.
Page 24
George Forbes. I line of apses , besides the inclination and position of the plane of the planet's orbit . The only object ever aimed at in those days was to prepare tables for predicting the places of the planets . It was not a ...
George Forbes. I line of apses , besides the inclination and position of the plane of the planet's orbit . The only object ever aimed at in those days was to prepare tables for predicting the places of the planets . It was not a ...
Page 27
... line is the natural motion , and that motion in a curve is the resultant of several movements . He believed , with Aristotle , that circular motion was the natural one . Copernicus made this rotation of the earth's axis about the pole ...
... line is the natural motion , and that motion in a curve is the resultant of several movements . He believed , with Aristotle , that circular motion was the natural one . Copernicus made this rotation of the earth's axis about the pole ...
Page 28
... lines of apses do not pass through to the sun . Such was the theory advanced by Copernicus : The earth moves in an epicycle , on a deferent whose centre is a little distance from the sun . The planets move in a similar way on epicycles ...
... lines of apses do not pass through to the sun . Such was the theory advanced by Copernicus : The earth moves in an epicycle , on a deferent whose centre is a little distance from the sun . The planets move in a similar way on epicycles ...
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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