History of Astronomy |
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Page 2
... heavens . If the appearance of a comet was sometimes noted simul- taneously with the death of a great ruler , or an eclipse with a scourge of plague , these might well be looked upon as causes in the same sense that the veering or ...
... heavens . If the appearance of a comet was sometimes noted simul- taneously with the death of a great ruler , or an eclipse with a scourge of plague , these might well be looked upon as causes in the same sense that the veering or ...
Page 3
... heavenly motions than was possible without these records . So Hipparchus , about 150 B.C. , and Ptolemy a little later , were able to use the observations of Chaldæan astrologers , as well as those of Alexandrian astro- nomers , and to ...
... heavenly motions than was possible without these records . So Hipparchus , about 150 B.C. , and Ptolemy a little later , were able to use the observations of Chaldæan astrologers , as well as those of Alexandrian astro- nomers , and to ...
Page 6
... heaven , which was a solid vault , or hemisphere , with its concavity turned downwards . The stars seemed to be fixed on this vault ; the moon , and later the planets , were seen to crawl over it . It was a great step to look on the ...
... heaven , which was a solid vault , or hemisphere , with its concavity turned downwards . The stars seemed to be fixed on this vault ; the moon , and later the planets , were seen to crawl over it . It was a great step to look on the ...
Page 9
... heaven is a complete sphere , and that stars are shining at mid - day , although eclipsed by the sun's brightness . It is also asserted , in the book called Chu - King , that in the time of Yao the year was known to have 365 days , and ...
... heaven is a complete sphere , and that stars are shining at mid - day , although eclipsed by the sun's brightness . It is also asserted , in the book called Chu - King , that in the time of Yao the year was known to have 365 days , and ...
Page 11
... heavenly bodies do not move by chance , nor by their own will , but by the determinate will and appointment of the gods . They recorded these move- ments , but mainly in the hope of tracing the will of the gods in mundane affairs ...
... heavenly bodies do not move by chance , nor by their own will , but by the determinate will and appointment of the gods . They recorded these move- ments , but mainly in the hope of tracing the will of the gods in mundane affairs ...
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Common terms and phrases
accurate observations Airy astro Astronomer Royal Astronomia Nova astronomical units attraction axis bright calculations Cape Cassini catalogue centre century comet compute Copernicus diameter discovered discovery earth eclipse epicycles equatoreal error excentric explain fact fixed stars Galileo Greenwich Halley heavenly bodies heavens heliometer Hipparchus Huggins hydrogen hypothesis instruments Johann Kepler John Herschel Jupiter Jupiter's Kepler Laplace Lick Observatory light line of apses line of sight lunar Mars mathematical mean distance mean motion measured Mercury meteor method miles a second moon moon's nebulæ Newton Observatory orbit parallax perihelion period photographic physical planet planetary pole position predicted proper motion proved Ptolemy R. S. Phil records refractor retrograde retrograde motion revolution revolve round ring rotation round the sun satellites seems showed Sirius solar system spectra spectroscope spectrum spots stellar sun-spots sun's surface supposed tables telescope theory tion Trans Tycho Brahe Uranus velocity Venus Verrier zenith