History of Astronomy |
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Page ix
... directions of a moving object , Mars - to deduce the exact shape of the path of each of these planets , and their actual positions on these paths at any time . Kepler's masterpiece is one of the most interesting books that was ever ...
... directions of a moving object , Mars - to deduce the exact shape of the path of each of these planets , and their actual positions on these paths at any time . Kepler's masterpiece is one of the most interesting books that was ever ...
Page 16
... direction . They seem to have been in great difficulty to explain how the earth is supported , just as were those who invented the myth of Atlas , or the Indians with the tortoise . Thales thought that the flat earth floated on water ...
... direction . They seem to have been in great difficulty to explain how the earth is supported , just as were those who invented the myth of Atlas , or the Indians with the tortoise . Thales thought that the flat earth floated on water ...
Page 19
... direction . On comparing his star positions with those of Timocharis and Aristillus he found no stars that had appeared or disappeared in the interval of 150 years ; but he found that all the stars seemed to have changed their places ...
... direction . On comparing his star positions with those of Timocharis and Aristillus he found no stars that had appeared or disappeared in the interval of 150 years ; but he found that all the stars seemed to have changed their places ...
Page 20
George Forbes. once in 26,000 years in the opposite direction to the planetary revolutions . Hipparchus was also the inventor of trigonometry , both plane and spherical . He explained the method of using eclipses for determining the ...
George Forbes. once in 26,000 years in the opposite direction to the planetary revolutions . Hipparchus was also the inventor of trigonometry , both plane and spherical . He explained the method of using eclipses for determining the ...
Page 22
... direction . The attempts of Ptolemy and others of his time to explain the retrograde motion in this way were only approximate . Let us suppose each planet to have a bar with one end centred at the earth . If at the other end of the bar ...
... direction . The attempts of Ptolemy and others of his time to explain the retrograde motion in this way were only approximate . Let us suppose each planet to have a bar with one end centred at the earth . If at the other end of the bar ...
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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