History of Astronomy |
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Page 3
... moon with as much confidence as it is affirmed in Lord Wolseley's Soldier's Pocket Book . Even if the scientific spirit of ... moon's longi- tude and the node of her orbit than any that could be R. A. S. Monthly Notices , Sup .; 1905 ...
... moon with as much confidence as it is affirmed in Lord Wolseley's Soldier's Pocket Book . Even if the scientific spirit of ... moon's longi- tude and the node of her orbit than any that could be R. A. S. Monthly Notices , Sup .; 1905 ...
Page 10
... moon's orbit revolves just once round the pole of the ecliptic , and for this reason the eclipses in one cycle are repeated with very slight modification in the next cycle , and so on for many centuries . It may be that the neglect of ...
... moon's orbit revolves just once round the pole of the ecliptic , and for this reason the eclipses in one cycle are repeated with very slight modification in the next cycle , and so on for many centuries . It may be that the neglect of ...
Page 18
... moon , which is far short of the mark . He also found the sun's diameter , correctly , to be half a degree . Eratosthenes ( 276–196 B.C. ) measured the inclination to the equator of the sun's ... moon's mean motion 18 THE GEOMETRICAL PERIOD.
... moon , which is far short of the mark . He also found the sun's diameter , correctly , to be half a degree . Eratosthenes ( 276–196 B.C. ) measured the inclination to the equator of the sun's ... moon's mean motion 18 THE GEOMETRICAL PERIOD.
Page 19
... moon's orbit and its inclination to the ecliptic . The motion of this plane round the pole of the ecliptic once in eighteen years complicated the problem . He located the moon's excentric as he had done the sun's . He also discovered ...
... moon's orbit and its inclination to the ecliptic . The motion of this plane round the pole of the ecliptic once in eighteen years complicated the problem . He located the moon's excentric as he had done the sun's . He also discovered ...
Page 24
... moon's apse , and thought he detected a smaller progression of the sun's apse . His tables were much more accurate than Ptolemy's . Abul Wefa , in the tenth century , seems to have discovered the moon's " variation . " Meanwhile the ...
... moon's apse , and thought he detected a smaller progression of the sun's apse . His tables were much more accurate than Ptolemy's . Abul Wefa , in the tenth century , seems to have discovered the moon's " variation . " Meanwhile the ...
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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 nebulę 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