History of Astronomy |
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Page 29
... parallax in the stars seemed to condemn his system , which had no physical basis to recommend it , and no simplification at all over the Egypto - Tychonic system , to which Copernicus himself drew attention . It has been necessary to ...
... parallax in the stars seemed to condemn his system , which had no physical basis to recommend it , and no simplification at all over the Egypto - Tychonic system , to which Copernicus himself drew attention . It has been necessary to ...
Page 36
... parallax . Later he employed the same method with the comets of 1577 , 1580 , 1582 , 1585 , 1590 , 1593 , and 1596 , and proved that they too had no measurable parallax and must be very distant . The startling discovery that stars are ...
... parallax . Later he employed the same method with the comets of 1577 , 1580 , 1582 , 1585 , 1590 , 1593 , and 1596 , and proved that they too had no measurable parallax and must be very distant . The startling discovery that stars are ...
Page 38
... parallax . He says ( De Mundi , etc. ) that the Ptolemean system was too complicated , and the new one which that great man Copernicus had proposed , following in the footsteps of Aristarchus of Samos , though there was nothing in it ...
... parallax . He says ( De Mundi , etc. ) that the Ptolemean system was too complicated , and the new one which that great man Copernicus had proposed , following in the footsteps of Aristarchus of Samos , though there was nothing in it ...
Page 79
... parallax of stars . He certainly found an annual varia- tion of zenith distance , but not at the times of year required by the parallax . This led him to the discovery of the " aberration " of light and of nutation . Bradley has been ...
... parallax of stars . He certainly found an annual varia- tion of zenith distance , but not at the times of year required by the parallax . This led him to the discovery of the " aberration " of light and of nutation . Bradley has been ...
Page 84
... parallax , it has been recognised as an instrument of the very highest accuracy , measuring the distance between stars correctly to less than a tenth of a second of arc . The superiority of the heliometer over all other devices ( except ...
... parallax , it has been recognised as an instrument of the very highest accuracy , measuring the distance between stars correctly to less than a tenth of a second of arc . The superiority of the heliometer over all other devices ( except ...
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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