History of Astronomy |
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Page 5
... of universal gravitation led to the conclusion that the inclination of the earth's equator to the plane of her orbit ( the obliquity of the ecliptic ) has been diminishing slowly since prehistoric times ; and this fact has been ...
... of universal gravitation led to the conclusion that the inclination of the earth's equator to the plane of her orbit ( the obliquity of the ecliptic ) has been diminishing slowly since prehistoric times ; and this fact has been ...
Page 42
... of the periodic times are propor- tional to the cubes of the mean distances from the sun . These three laws contain implicitly the law of universal gravitation . They are simply an alternative 1 The ruled logarithmic paper we now use ...
... of the periodic times are propor- tional to the cubes of the mean distances from the sun . These three laws contain implicitly the law of universal gravitation . They are simply an alternative 1 The ruled logarithmic paper we now use ...
Page 44
... gravity that makes a stone fall . saw the difficulty of gravitation acting through the void space . M He compared universal gravi- tation to magnetism , and speaks of the work of Gilbert of Col- chester . ( Gilbert's book , De Mundo ...
... gravity that makes a stone fall . saw the difficulty of gravitation acting through the void space . M He compared universal gravi- tation to magnetism , and speaks of the work of Gilbert of Col- chester . ( Gilbert's book , De Mundo ...
Page 45
... of Kepler's greatest book , it must be obvious that he had at that time some inkling of the meaning of his laws - universal gravitation . From that moment the idea of universal gravitation was in the air , and hints and guesses were ...
... of Kepler's greatest book , it must be obvious that he had at that time some inkling of the meaning of his laws - universal gravitation . From that moment the idea of universal gravitation was in the air , and hints and guesses were ...
Page 51
... of relation to the more modern , but equally misleading , " nebular hypothesis . " While many were talking and guessing , a giant mind was needed at this stage to make things clear . 7. Sir Isaac Newton - Law of Universal Gravitation ...
... of relation to the more modern , but equally misleading , " nebular hypothesis . " While many were talking and guessing , a giant mind was needed at this stage to make things clear . 7. Sir Isaac Newton - Law of Universal Gravitation ...
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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