History of Astronomy |
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Page 54
... theory which he had reluctantly abandoned years before excited him so keenly that he was forced to hand over his calculations to a friend , to be completed by him . The universality claimed for the law - if not by 54 THE DYNAMICAL PERIOD.
... theory which he had reluctantly abandoned years before excited him so keenly that he was forced to hand over his calculations to a friend , to be completed by him . The universality claimed for the law - if not by 54 THE DYNAMICAL PERIOD.
Page 56
... For a long time this was the one weak point in the Newtonian theory . It was not till 1747 that Clairaut reconciled this with the theory , and showed why Newton's exact . calculation was not Newton 56 THE DYNAMICAL PERIOD.
... For a long time this was the one weak point in the Newtonian theory . It was not till 1747 that Clairaut reconciled this with the theory , and showed why Newton's exact . calculation was not Newton 56 THE DYNAMICAL PERIOD.
Page 57
... calculations , but had he expressed his results in that language he would have been unin- telligible to many . Newton's method of calculating the precession of the equinoxes , already referred to , is as beautiful as any- thing in the ...
... calculations , but had he expressed his results in that language he would have been unin- telligible to many . Newton's method of calculating the precession of the equinoxes , already referred to , is as beautiful as any- thing in the ...
Page 61
... calculations showed the new value to depend upon the excentricity of the earth's orbit , which , according to theory ... calculation was wrong , and that the value he found was too large ; so , part of the acceleration is now attributed ...
... calculations showed the new value to depend upon the excentricity of the earth's orbit , which , according to theory ... calculation was wrong , and that the value he found was too large ; so , part of the acceleration is now attributed ...
Page 63
... calculations that this might easily be due to planetary perturbations . Finally , he arrived at the conclusion that all of these comets were identical , travelling in an ellipse so elongated that the part where the comet was seen seemed ...
... calculations that this might easily be due to planetary perturbations . Finally , he arrived at the conclusion that all of these comets were identical , travelling in an ellipse so elongated that the part where the comet was seen seemed ...
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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