History of Astronomy |
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Page 9
... determine the positions of the solstices and equinoxes , and they reported the names of the stars in the places occupied by the sun at these seasons , and in 2285 B. C. he gave them further orders . If this account be true , it shows a ...
... determine the positions of the solstices and equinoxes , and they reported the names of the stars in the places occupied by the sun at these seasons , and in 2285 B. C. he gave them further orders . If this account be true , it shows a ...
Page 12
... determining the courses of the sun , moon , and of the five planets Mercury , Venus , Mars , Jupiter , and Saturn . We have records of observations carried on under Asshurbanapal , who sent astronomers to different parts to study ...
... determining the courses of the sun , moon , and of the five planets Mercury , Venus , Mars , Jupiter , and Saturn . We have records of observations carried on under Asshurbanapal , who sent astronomers to different parts to study ...
Page 13
... ; that an eclipse of the moon happens when the earth cuts off the sun's light from her . He supposed the earth to be flat , and to float upon water . He determined the ratio of THE GEOMETRICAL PERIOD 13 THE MOON AND PLANETS PAGE.
... ; that an eclipse of the moon happens when the earth cuts off the sun's light from her . He supposed the earth to be flat , and to float upon water . He determined the ratio of THE GEOMETRICAL PERIOD 13 THE MOON AND PLANETS PAGE.
Page 14
George Forbes. to float upon water . He determined the ratio of the sun's diameter to its orbit , and apparently made out the diameter correctly as half a degree . He left nothing in writing . His successors , Anaximander ( 610-547 B.C. ) ...
George Forbes. to float upon water . He determined the ratio of the sun's diameter to its orbit , and apparently made out the diameter correctly as half a degree . He left nothing in writing . His successors , Anaximander ( 610-547 B.C. ) ...
Page 17
... determining the day of the year or month , and the hour of the night , ...... but as to learning the courses of the ... determination of planetary motions . Aristarchus ( 320-250 B.C. ) showed that THE GEOMETRICAL PERIOD 17.
... determining the day of the year or month , and the hour of the night , ...... but as to learning the courses of the ... determination of planetary motions . Aristarchus ( 320-250 B.C. ) showed that THE GEOMETRICAL PERIOD 17.
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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