Fourteen Weeks in Descriptive Astronomy |
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Page 25
... orbits of the planets . He adopted the Copernican theory , that the sun is the centre of the system . At that time all be- lieved the orbits to be circular . Since ... orbit the observations of Brahé would not fit the computed 2 HISTORY . 25.
... orbits of the planets . He adopted the Copernican theory , that the sun is the centre of the system . At that time all be- lieved the orbits to be circular . Since ... orbit the observations of Brahé would not fit the computed 2 HISTORY . 25.
Page 26
Joel Dorman Steele. orbit the observations of Brahé would not fit the computed place by eight minutes of a degree . Be- lieving that so good an astronomer could not be mistaken as to the facts , Kepler exclaimed , " Out of these eight ...
Joel Dorman Steele. orbit the observations of Brahé would not fit the computed place by eight minutes of a degree . Be- lieving that so good an astronomer could not be mistaken as to the facts , Kepler exclaimed , " Out of these eight ...
Page 27
... orbit , having the sun at the centre , and again fol- lowed the planet Mars in its course . But very soon there was as great discrepancy between the observed and computed places as before . Undismayed by this failure , Kepler assumed ...
... orbit , having the sun at the centre , and again fol- lowed the planet Mars in its course . But very soon there was as great discrepancy between the observed and computed places as before . Undismayed by this failure , Kepler assumed ...
Page 30
... he watched them , discovered a fourth star , and finally found that they were all rapidly revolving around Jupiter , each in its elliptical orbit , with its own rate of motion , and all accompanying the planet in its 30 INTRODUCTION .
... he watched them , discovered a fourth star , and finally found that they were all rapidly revolving around Jupiter , each in its elliptical orbit , with its own rate of motion , and all accompanying the planet in its 30 INTRODUCTION .
Page 35
... orbit , so that if we should draw two parallel lines , one from each end of the earth's orbit , to the sphere , although these lines would be 183,000,000 miles apart , yet they would be extended so far that we could not separate them ...
... orbit , so that if we should draw two parallel lines , one from each end of the earth's orbit , to the sphere , although these lines would be 183,000,000 miles apart , yet they would be extended so far that we could not separate them ...
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ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac