History of Astronomy |
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... detection of the eighteenyear cycleknown to the Chaldeans as the Saros. It consists of 235 lunations, and in that time the poleof the moon's orbit revolves justonce round the poleofthe ecliptic,and for this reason the eclipses in one ...
... detection of the eighteenyear cycleknown to the Chaldeans as the Saros. It consists of 235 lunations, and in that time the poleof the moon's orbit revolves justonce round the poleofthe ecliptic,and for this reason the eclipses in one ...
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... detected a smaller progression of the sun's apse. His tables weremuch more accurate than Ptolemy's. Abul Wefa, inthe tenth century, seems to have discovered the moon's "variation." Meanwhile the Moors were leadersof science inthe west ...
... detected a smaller progression of the sun's apse. His tables weremuch more accurate than Ptolemy's. Abul Wefa, inthe tenth century, seems to have discovered the moon's "variation." Meanwhile the Moors were leadersof science inthe west ...
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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