History of Astronomy |
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Page viii
... called mathematics , which even now has not solved directly the problem of only three bodies . These reflections , arising from the writing of this History , go to explain the invariable humility of the great mathe- matical astronomers ...
... called mathematics , which even now has not solved directly the problem of only three bodies . These reflections , arising from the writing of this History , go to explain the invariable humility of the great mathe- matical astronomers ...
Page 8
... about 2952 B.C. , and shortly afterwards Yu - Chi made a sphere to represent the motions of the celestial bodies . It is also mentioned , in the book called Chu- King , supposed to have been written in 2205 B.C. 8 THE GEOMETRICAL PERIOD.
... about 2952 B.C. , and shortly afterwards Yu - Chi made a sphere to represent the motions of the celestial bodies . It is also mentioned , in the book called Chu- King , supposed to have been written in 2205 B.C. 8 THE GEOMETRICAL PERIOD.
Page 9
... called Chu - King , that in the time of Yao the year was known to have 3654 days , and that he adopted 365 days and added an intercalary day every four years ( as in the Julian Calendar ) . This may be true or not , but the ancient ...
... called Chu - King , that in the time of Yao the year was known to have 3654 days , and that he adopted 365 days and added an intercalary day every four years ( as in the Julian Calendar ) . This may be true or not , but the ancient ...
Page 14
... called the Antichthon . Copernicus in the sixteenth century claimed Pythagoras as the founder of the system which he , Copernicus , revived . Anaxagoras ( born 499 B.C. ) studied astronomy in Egypt . He explained the return of the sun ...
... called the Antichthon . Copernicus in the sixteenth century claimed Pythagoras as the founder of the system which he , Copernicus , revived . Anaxagoras ( born 499 B.C. ) studied astronomy in Egypt . He explained the return of the sun ...
Page 15
... called Saros of 223 lunations , or a little over eighteen years . The Metonic cycle is 235 lunations or nineteen years , after which period the sun and moon occupy the same position relative to the stars . It is still used for fixing ...
... called Saros of 223 lunations , or a little over eighteen years . The Metonic cycle is 235 lunations or nineteen years , after which period the sun and moon occupy the same position relative to the stars . It is still used for fixing ...
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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