History of Astronomy |
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Page 30
... error , which was started not by astro- nomers acquainted with Kepler's work , but by those who desired to put the Church in the wrong by extolling Copernicus . Copernicus dreaded much the abuse he expected to receive from philosophers ...
... error , which was started not by astro- nomers acquainted with Kepler's work , but by those who desired to put the Church in the wrong by extolling Copernicus . Copernicus dreaded much the abuse he expected to receive from philosophers ...
Page 35
... errors of graduation and the errors of mounting , the necessary correction being applied to each observation . When he ... error in right ascension is only 24 " , 1 , and in declination only ± 25 ′′ , 9 . Clocks of a sort had been made ...
... errors of graduation and the errors of mounting , the necessary correction being applied to each observation . When he ... error in right ascension is only 24 " , 1 , and in declination only ± 25 ′′ , 9 . Clocks of a sort had been made ...
Page 37
... error as much as two degrees . He re - discovered the inequality called " variation " by observing the moon in all phases — a thing which had not been attended to . [ It is remarkable that in the nineteenth century Sir George Airy estab ...
... error as much as two degrees . He re - discovered the inequality called " variation " by observing the moon in all phases — a thing which had not been attended to . [ It is remarkable that in the nineteenth century Sir George Airy estab ...
Page 40
... observations , he still found errors amounting to eight minutes of a degree . Then he said boldly that it was impossible that so good an observer as Tycho could have made a mistake of eight minutes , and 40 THE DYNAMICAL PERIOD.
... observations , he still found errors amounting to eight minutes of a degree . Then he said boldly that it was impossible that so good an observer as Tycho could have made a mistake of eight minutes , and 40 THE DYNAMICAL PERIOD.
Page 50
... errors in Jupiter's calculated place , due to what we now know as the long inequality of Jupiter and Saturn , and measured with considerable accuracy the acceleration at that date of Jupiter's mean motion , and indicated the retardation ...
... errors in Jupiter's calculated place , due to what we now know as the long inequality of Jupiter and Saturn , and measured with considerable accuracy the acceleration at that date of Jupiter's mean motion , and indicated the retardation ...
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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