History of Astronomy |
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Page 16
... axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary deductive methods adopted by the ancient Greeks . But they went much farther in the same direction . They seem to have been in great ...
... axis , but to have no orbital motion . The short epitome so far given illustrates the extraordinary deductive methods adopted by the ancient Greeks . But they went much farther in the same direction . They seem to have been in great ...
Page 25
... axis , in the opposite direction to the apparent motion of the stars . Also in the writings of Martianus Capella he learnt that the Egyptians had supposed Mercury and Venus to revolve round the sun , and to be carried with him in his ...
... axis , in the opposite direction to the apparent motion of the stars . Also in the writings of Martianus Capella he learnt that the Egyptians had supposed Mercury and Venus to revolve round the sun , and to be carried with him in his ...
Page 27
... axis about the pole of the ecliptic retrograde ( i.e. , opposite to the orbital revolution ) , and by making it perform more than one complete revolution in a year , the added part being too of the whole , he was able to include the ...
... axis about the pole of the ecliptic retrograde ( i.e. , opposite to the orbital revolution ) , and by making it perform more than one complete revolution in a year , the added part being too of the whole , he was able to include the ...
Page 28
... axis rotates about the pole of the ecliptic , making one revolution and a twenty - six thousandth part of a revolution in the sidereal year , in the opposite direction to its orbital motion . In view of this fanciful structure it must ...
... axis rotates about the pole of the ecliptic , making one revolution and a twenty - six thousandth part of a revolution in the sidereal year , in the opposite direction to its orbital motion . In view of this fanciful structure it must ...
Page 41
... axis . DE is the minor axis . C is the centre . The direction of AB is the line of apses . The ratio of CS to CA is the exccntricity . The position of the planet at A is the perihelion ( nearest to the sun ) . The position of the planet ...
... axis . DE is the minor axis . C is the centre . The direction of AB is the line of apses . The ratio of CS to CA is the exccntricity . The position of the planet at A is the perihelion ( nearest to the sun ) . The position of the planet ...
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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