History of Astronomy |
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... motion to enableus to representtruly theapparent motions. Thisway of looking at the apparent motions showswhy each planet, when nearest tothe earth, seems to move foratime ina retrograde direction. The attempts of Ptolemy andothers ...
... motion to enableus to representtruly theapparent motions. Thisway of looking at the apparent motions showswhy each planet, when nearest tothe earth, seems to move foratime ina retrograde direction. The attempts of Ptolemy andothers ...
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... retrograde motion of planets when in opposition. We must here notice thatat this stage Copernicus was actually confronted with thesystem acceptedlater byTycho Brahe, withthe earth fixed.Buthe nowrecalled and accepted the views of ...
... retrograde motion of planets when in opposition. We must here notice thatat this stage Copernicus was actually confronted with thesystem acceptedlater byTycho Brahe, withthe earth fixed.Buthe nowrecalled and accepted the views of ...
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... retrograde motion,as thePtolemaic theory did.Furthermore, either systemcould use theexcentric of Hipparchus to explain theirregular motion knownas theequation of the centre. But ... motion, and added it to the two real motions (rotation and.
... retrograde motion,as thePtolemaic theory did.Furthermore, either systemcould use theexcentric of Hipparchus to explain theirregular motion knownas theequation of the centre. But ... motion, and added it to the two real motions (rotation and.
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... motion inastraight line is thenaturalmotion, and thatmotion ina curve isthe resultant ofseveral movements. He ... retrograde (i.e., opposite to the orbital revolution), and by making it performmore than one complete revolutionin ayear ...
... motion inastraight line is thenaturalmotion, and thatmotion ina curve isthe resultant ofseveral movements. He ... retrograde (i.e., opposite to the orbital revolution), and by making it performmore than one complete revolutionin ayear ...
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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