History of Astronomy |
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... planets Mercury, Venus, Mars, Jupiter, and Saturn. We have records of observations carried on under Asshurbanapal, who sent astronomers todifferent parts to study celestial phenomena. Here is one:— To theDirector of Observations,—My ...
... planets Mercury, Venus, Mars, Jupiter, and Saturn. We have records of observations carried on under Asshurbanapal, who sent astronomers todifferent parts to study celestial phenomena. Here is one:— To theDirector of Observations,—My ...
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... planetary theory which as generally stated sounds most fanciful. He imagined the fixed stars to be on a vault of heaven; and the sun, moon, and planets to be upon similar vaults or spheres, twentysixrevolving spheres in all, the motion ...
... planetary theory which as generally stated sounds most fanciful. He imagined the fixed stars to be on a vault of heaven; and the sun, moon, and planets to be upon similar vaults or spheres, twentysixrevolving spheres in all, the motion ...
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... planets, andtoinquire about theirdistances from the earth, and their orbits, andthecauses of theirmotions, he strongly objected to sucha wasteof valuable time. Hedwelton the contradictions and conflicting opinions ofthe physical ...
... planets, andtoinquire about theirdistances from the earth, and their orbits, andthecauses of theirmotions, he strongly objected to sucha wasteof valuable time. Hedwelton the contradictions and conflicting opinions ofthe physical ...
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... planets intheir orbits pass, thus facilitating the determination of planetary motions. Aristarchus (320250B.C.) showedthat thesun must beat least nineteen times asfaroffasthe moon,which isfarshort of the mark. Healsofound the sun's ...
... planets intheir orbits pass, thus facilitating the determination of planetary motions. Aristarchus (320250B.C.) showedthat thesun must beat least nineteen times asfaroffasthe moon,which isfarshort of the mark. Healsofound the sun's ...
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... planet to have abar with one end centred at the earth. If at theother endof the bar one end ofa shorter bar is pivotted, having the planet at its other end,then the planet is given anannual motion in the secondary circle (the epicycle) ...
... planet to have abar with one end centred at the earth. If at theother endof the bar one end ofa shorter bar is pivotted, having the planet at its other end,then the planet is given anannual motion in the secondary circle (the epicycle) ...
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Airy allthe andthat andthe asthe Astronomer Royal Astronomia Nova astronomical units atmosphere atthe attraction axis bright bythe calculations catalogue centre century Chaldĉans Chinese comet confirmed Copernicus detected diameter discovered discovery distance earth eclipse epicycles equatoreal excentric explain fixed stars FOOTNOTES Frauenhofer fromthe Galileo Greenwich Halley havebeen heavenly bodies heavens heliometer Herschel Hipparchus Huggins hydrogen hypotheses inequality instruments inthe isthe John Herschel Jupiter Jupiter's Kepler lawof Lick Observatory light lines lunar Mars mathematical mean motion measured Mercury meteor miles moon moon's nebula Newton ofthese onthe orbit parallax perihelion period photographic physical planet planetary position predicted proper motion Ptolemy records reflector refractor retrograde retrograde motion revolve rotation round satellites Saturn seems solar system spectra spectroscope spectrum spots stellar sun's sunspot supposed surface telescope terrestrial thatthe theearth themoon theory thesame thesolar thesun tobe tothe Tycho Brahe Uranus velocity Venus Verrier William Herschel withthe zenith