History of Astronomy |
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Page 38
... stellar 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 ...
... stellar 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 ...
Page 50
... also the Royal Observatory of Greeenwich , where he established Flamsteed as first Astronomer Royal , especially for lunar and stellar observations likely to be All useful for navigation . At the same time the 50 THE DYNAMICAL PERIOD.
... also the Royal Observatory of Greeenwich , where he established Flamsteed as first Astronomer Royal , especially for lunar and stellar observations likely to be All useful for navigation . At the same time the 50 THE DYNAMICAL PERIOD.
Page 84
... Stellar 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 ...
... Stellar 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 ...
Page 127
... stellar parallax failed , but led to the discovery of aberration , nutation , and the true velocity of light . Parallax . - The absence of stellar parallax was the great objection to any theory of the earth's motion prior to Kepler's ...
... stellar parallax failed , but led to the discovery of aberration , nutation , and the true velocity of light . Parallax . - The absence of stellar parallax was the great objection to any theory of the earth's motion prior to Kepler's ...
Page 128
... stellar parallaxes is the result of Gill's work ( Cape Results , vol . iii . , part ii . , 1900 ) . 3 Taking the velocity of light at 186,000 miles a second , and the earth's mean distance at 93,000,000 miles , I light- year ...
... stellar parallaxes is the result of Gill's work ( Cape Results , vol . iii . , part ii . , 1900 ) . 3 Taking the velocity of light at 186,000 miles a second , and the earth's mean distance at 93,000,000 miles , I light- year ...
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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