History of Astronomy |
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Page 11
... held the same station and dignity in the State as did the priests in Egypt , and spent all their time in the study of philosophy and astronomy , and the arts of divination and astrology . They held that the world of which we have a ...
... held the same station and dignity in the State as did the priests in Egypt , and spent all their time in the study of philosophy and astronomy , and the arts of divination and astrology . They held that the world of which we have a ...
Page 13
... held that the sun , moon , and stars are not mere spots on the heavenly vault , but solids ; that the moon derives her light from the sun , and that this fact explains her phases ; that an eclipse of the moon happens when the earth cuts ...
... held that the sun , moon , and stars are not mere spots on the heavenly vault , but solids ; that the moon derives her light from the sun , and that this fact explains her phases ; that an eclipse of the moon happens when the earth cuts ...
Page 14
... held absurd notions about the sun , moon , and stars , while Heraclitus ( 540–500 B.C. ) supposed that the stars were lighted each night like lamps , and the sun each morning . Parmenides supposed the earth to be a sphere . Pythagoras ...
... held absurd notions about the sun , moon , and stars , while Heraclitus ( 540–500 B.C. ) supposed that the stars were lighted each night like lamps , and the sun each morning . Parmenides supposed the earth to be a sphere . Pythagoras ...
Page 16
... held the earth to be fixed in the centre of the world . Nicetas , Heraclides , and Ecphantes supposed the earth to revolve on its axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary ...
... held the earth to be fixed in the centre of the world . Nicetas , Heraclides , and Ecphantes supposed the earth to revolve on its axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary ...
Page 17
... held that the speculators on the universe and on the laws of the heavenly bodies were no better than madmen ( Xen . Mem , i . 1 , 11-15 ) . Plato ( born 429 B.C. ) , the pupil of Socrates , the fellow - student of Euclid , and a ...
... held that the speculators on the universe and on the laws of the heavenly bodies were no better than madmen ( Xen . Mem , i . 1 , 11-15 ) . Plato ( born 429 B.C. ) , the pupil of Socrates , the fellow - student of Euclid , and a ...
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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