History of Astronomy |
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Page 6
... distances from the earth instead of having them stuck on the vault of heaven . was a transition from " flatland " to a space of three dimensions . sun . It Great progress was made when systematic observa- tions began , such as following ...
... distances from the earth instead of having them stuck on the vault of heaven . was a transition from " flatland " to a space of three dimensions . sun . It Great progress was made when systematic observa- tions began , such as following ...
Page 17
... distances from the earth , and their orbits , and the causes of their motions , he strongly objected to such a waste of valuable time . He dwelt on the contradictions and conflicting opinions of the physical philosophers , ...... and ...
... distances from the earth , and their orbits , and the causes of their motions , he strongly objected to such a waste of valuable time . He dwelt on the contradictions and conflicting opinions of the physical philosophers , ...... and ...
Page 18
... distance from the fixed earth . He called this point the excentric . The line from the earth to the " excentric " was called the line of apses . A circle having this centre was called the equant , and he supposed that a radius drawn to ...
... distance from the fixed earth . He called this point the excentric . The line from the earth to the " excentric " was called the line of apses . A circle having this centre was called the equant , and he supposed that a radius drawn to ...
Page 23
... distance of the excentric3 from the centre of the deferent , and the position of the For definition see p . 22 . 3 For definition see p . 18 . 2 Ibid . C line of apses , ' besides the inclination and position THE GEOMETRICAL PERIOD 23.
... distance of the excentric3 from the centre of the deferent , and the position of the For definition see p . 22 . 3 For definition see p . 18 . 2 Ibid . C line of apses , ' besides the inclination and position THE GEOMETRICAL PERIOD 23.
Page 28
... distance from the sun . The planets move in a similar way on epicycles , but their deferents have no geometrical or physical relation to the sun . The moon moves on an epicycle centred on a second epicycle , itself centred on a deferent ...
... distance from the sun . The planets move in a similar way on epicycles , but their deferents have no geometrical or physical relation to the sun . The moon moves on an epicycle centred on a second epicycle , itself centred on a deferent ...
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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