History of Astronomy |
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Page 18
... motion of the sun ; and allowed for this in his calculations by supposing that the centre , about which the sun moves uniformly , is situated a little distance from the fixed earth . He called this ... mean motion 18 THE GEOMETRICAL PERIOD.
... motion of the sun ; and allowed for this in his calculations by supposing that the centre , about which the sun moves uniformly , is situated a little distance from the fixed earth . He called this ... mean motion 18 THE GEOMETRICAL PERIOD.
Page 19
... mean motion . This was conclusively estab- lished , but could not be explained by the Newtonian theory for quite a long time . ] He determined the plane of the moon's orbit and its inclination to the ecliptic . The motion of this plane ...
... mean motion . This was conclusively estab- lished , but could not be explained by the Newtonian theory for quite a long time . ] He determined the plane of the moon's orbit and its inclination to the ecliptic . The motion of this plane ...
Page 41
... motions of all the planets . " . And he did it , with elliptic orbits having ... motion was the most strict and complete theory that had ever been attempted ... mean distance of the planet from the sun . E excellence of Copernicus's book ...
... motions of all the planets . " . And he did it , with elliptic orbits having ... motion was the most strict and complete theory that had ever been attempted ... mean distance of the planet from the sun . E excellence of Copernicus's book ...
Page 50
... mean motion , and indicated the retardation of Saturn's mean motion . Horrocks ' investigations , so far as they could be collected , were published posthumously in 1672 , and seldom , if ever , has a man who lived only twenty - two ...
... mean motion , and indicated the retardation of Saturn's mean motion . Horrocks ' investigations , so far as they could be collected , were published posthumously in 1672 , and seldom , if ever , has a man who lived only twenty - two ...
Page 57
... Mean monthly motion of Apses Mean annual motion of nodes Mean value of " variation " Annual equation ... Inequality of mean motion of apogee Inequality of mean motion of nodes Newton . 0 / 11 1.31.28 19.18.1,23 36.10 19.43 Modern Tables ...
... Mean monthly motion of Apses Mean annual motion of nodes Mean value of " variation " Annual equation ... Inequality of mean motion of apogee Inequality of mean motion of nodes Newton . 0 / 11 1.31.28 19.18.1,23 36.10 19.43 Modern Tables ...
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Common terms and phrases
accurate observations Airy astro Astronomer Royal Astronomia Nova astronomical units attraction axis bright calculations Cape Cassini catalogue centre century comet compute Copernicus diameter discovered discovery earth eclipse epicycles equatoreal error excentric explain fact fixed stars Galileo Greenwich Halley heavenly bodies heavens heliometer Hipparchus Huggins hydrogen hypothesis instruments Johann Kepler John Herschel Jupiter Jupiter's Kepler Laplace Lick Observatory light line of apses line of sight lunar Mars mathematical mean distance mean motion measured Mercury meteor method miles a second moon moon's nebulæ Newton Observatory orbit parallax perihelion period photographic physical planet planetary pole position predicted proper motion proved Ptolemy R. S. Phil records refractor retrograde retrograde motion revolution revolve round ring rotation round the sun satellites seems showed Sirius solar system spectra spectroscope spectrum spots stellar sun-spots sun's surface supposed tables telescope theory tion Trans Tycho Brahe Uranus velocity Venus Verrier zenith