History of Astronomy |
From inside the book
Results 1-5 of 9
Page 18
... 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 the sun from the excentric passes over equal arcs on 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 the sun from the excentric passes over equal arcs on the ...
Page 19
... excentric as he had done the sun's . He also discovered some of the minor irregularities of the moon's motion , due , as Newton's theory proves , to the disturbing action of the sun's attraction . In the year 134 B.C. Hipparchus ...
... excentric as he had done the sun's . He also discovered some of the minor irregularities of the moon's motion , due , as Newton's theory proves , to the disturbing action of the sun's attraction . In the year 134 B.C. Hipparchus ...
Page 21
... in the Camb . Phil . Soc . Proc . , vol . iv . , pt . ii . , p . 93 , on whose authority the above statements are made . 3 See p . 6 for definition . of the universe . He adopted the excentric and equant THE GEOMETRICAL PERIOD 21 121.
... in the Camb . Phil . Soc . Proc . , vol . iv . , pt . ii . , p . 93 , on whose authority the above statements are made . 3 See p . 6 for definition . of the universe . He adopted the excentric and equant THE GEOMETRICAL PERIOD 21 121.
Page 22
... excentric . Ptolemy supposed the centres of the epicycles of Mercury and Venus to be on a bar passing through the sun , and to be between the earth and the sun . The centres of the epicycles of Mars , Jupiter , and Saturn were supposed ...
... excentric . Ptolemy supposed the centres of the epicycles of Mercury and Venus to be on a bar passing through the sun , and to be between the earth and the sun . The centres of the epicycles of Mars , Jupiter , and Saturn were supposed ...
Page 23
... excentric of Hipparchus , as the responses of these astronomers to the demand of Plato for uniform circular motions . Their use became more and more confirmed , until the seventeenth century , when the accurate observations of Tycho ...
... excentric of Hipparchus , as the responses of these astronomers to the demand of Plato for uniform circular motions . Their use became more and more confirmed , until the seventeenth century , when the accurate observations of Tycho ...
Other editions - View all
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