History of Astronomy |
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... the earth's equator to the plane ofher orbit (the obliquityof the ecliptic) has been diminishing slowly since prehistoric times; and this fact has been confirmed by Egyptian and Chineseobservations onthelength of the shadow ofavertical ...
... the earth's equator to the plane ofher orbit (the obliquityof the ecliptic) has been diminishing slowly since prehistoric times; and this fact has been confirmed by Egyptian and Chineseobservations onthelength of the shadow ofavertical ...
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... earth instead of having them stuck on the vaultof heaven. Itwas a transition from "flatland" to a space of three dimensions. Great progress was madewhen systematic observations began, such asfollowingthe motion of the moon andplanets ...
... earth instead of having them stuck on the vaultof heaven. Itwas a transition from "flatland" to a space of three dimensions. Great progress was madewhen systematic observations began, such asfollowingthe motion of the moon andplanets ...
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... earth cutsoff the sun's lightfrom her.He supposed theearth tobeflat, and to floatupon water.He determined theratio ofthe sun's diameter toits orbit,and apparently made out the diameter correctly as half a degree. He left nothingin ...
... earth cutsoff the sun's lightfrom her.He supposed theearth tobeflat, and to floatupon water.He determined theratio ofthe sun's diameter toits orbit,and apparently made out the diameter correctly as half a degree. He left nothingin ...
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... earth," "Ten is the perfect number."Hewrote nothing, butis supposedto have said that the earth, moon, fiveplanets, andfixed stars all revolve round the sun,which itself revolves round an imaginary central fire calledthe Antichthon ...
... earth," "Ten is the perfect number."Hewrote nothing, butis supposedto have said that the earth, moon, fiveplanets, andfixed stars all revolve round the sun,which itself revolves round an imaginary central fire calledthe Antichthon ...
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... the extraordinarydeductive methodsadopted bytheancient Greeks. But they wentmuch fartherin the same direction. They seemto have beeningreat difficultyto explain how the earth is supported, just as were those who invented.
... the extraordinarydeductive methodsadopted bytheancient Greeks. But they wentmuch fartherin the same direction. They seemto have beeningreat difficultyto explain how the earth is supported, just as were those who invented.
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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