History of Astronomy |
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... and the inferred motion ofthe sunamong the stars, by observing their heliacal risings—i.e., the times of year whena ... and the Peruvians, for example. We do know this, that all nations required tohave a calendar. The solar year, the ...
... and the inferred motion ofthe sunamong the stars, by observing their heliacal risings—i.e., the times of year whena ... and the Peruvians, for example. We do know this, that all nations required tohave a calendar. The solar year, the ...
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... andthe artsof divinationand astrology. They heldthatthe world of whichwe have a conception is an eternalworld withoutany beginning or ending, in which all thingsare orderedby rules supported byadivine providence, and that the ...
... andthe artsof divinationand astrology. They heldthatthe world of whichwe have a conception is an eternalworld withoutany beginning or ending, in which all thingsare orderedby rules supported byadivine providence, and that the ...
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... and the signs of the zodiac, and the positions ofthe solstices. He heldthatthesun, moon, and stars arenotmere spotson theheavenly vault,but solids; that the moonderives her light from thesun, andthat this fact explains her phases ...
... and the signs of the zodiac, and the positions ofthe solstices. He heldthatthesun, moon, and stars arenotmere spotson theheavenly vault,but solids; that the moonderives her light from thesun, andthat this fact explains her phases ...
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... and the suneachmorning. Parmenides supposed the earthto be a sphere. Pythagoras(569470 B.C.) visited Egypt to study science. He deduced his system, in whichthe earthrevolvesin an orbit, from fantastic first principles,of which the ...
... and the suneachmorning. Parmenides supposed the earthto be a sphere. Pythagoras(569470 B.C.) visited Egypt to study science. He deduced his system, in whichthe earthrevolvesin an orbit, from fantastic first principles,of which the ...
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... and the sun, moon, and planets to be upon similar vaults or spheres, twentysixrevolving spheres in all, the motion ofeach planetbeing resolved intoitscomponents, and a separate sphere being assigned for each component motion. Callippus ...
... and the sun, moon, and planets to be upon similar vaults or spheres, twentysixrevolving spheres in all, the motion ofeach planetbeing resolved intoitscomponents, and a separate sphere being assigned for each component motion. Callippus ...
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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 Chaldæans 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