History of Astronomy |
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Page 19
... attraction . In the year 134 B.C. Hipparchus observed a new star . This upset every notion about the permanence of the fixed stars . He then set to work to catalogue all the principal stars so as to know if any others appeared or ...
... attraction . In the year 134 B.C. Hipparchus observed a new star . This upset every notion about the permanence of the fixed stars . He then set to work to catalogue all the principal stars so as to know if any others appeared or ...
Page 26
... attraction of the sun . To correct for these irregularities Copernicus introduced epicycle on epicycle in the lunar orbit . This is in its main features the system propounded In his great book Copernicus says : " The movement of the ...
... attraction of the sun . To correct for these irregularities Copernicus introduced epicycle on epicycle in the lunar orbit . This is in its main features the system propounded In his great book Copernicus says : " The movement of the ...
Page 44
... attract- ing in such manner that the earth attracts a stone much more than a stone attracts the earth . 3. Bodies are attracted to the earth's centre , not because it is the centre of the universe , but 44 THE DYNAMICAL PERIOD.
... attract- ing in such manner that the earth attracts a stone much more than a stone attracts the earth . 3. Bodies are attracted to the earth's centre , not because it is the centre of the universe , but 44 THE DYNAMICAL PERIOD.
Page 45
... attracted to its centre , but to different points in the neighbourhood of that centre . 5. If the earth and moon ... attraction . Kepler had been appointed Imperial Astronomer with a handsome salary ( on paper ) , a fraction of which ...
... attracted to its centre , but to different points in the neighbourhood of that centre . 5. If the earth and moon ... attraction . Kepler had been appointed Imperial Astronomer with a handsome salary ( on paper ) , a fraction of which ...
Page 52
... attraction for both of them follow the same law as to distance as is given by the planetary motions round the sun ? It has been stated that in this way the first conception of universal gravitation arose.1 Quite the most important event ...
... attraction for both of them follow the same law as to distance as is given by the planetary motions round the sun ? It has been stated that in this way the first conception of universal gravitation arose.1 Quite the most important event ...
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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