History of Astronomy |
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Page 3
... enabled , in the last few years , to correct the lunar tables of Hansen , and to find a more accurate value for the secular acceleration of the moon's longi- tude and the node of her orbit than any that could be R. A. S. Monthly Notices ...
... enabled , in the last few years , to correct the lunar tables of Hansen , and to find a more accurate value for the secular acceleration of the moon's longi- tude and the node of her orbit than any that could be R. A. S. Monthly Notices ...
Page 5
... enabled to trace back the period during which Halley's comet has been a member of the solar system , and to identify it in the Chinese observations of comets as far back as 12 B.C. Cowell and Cromellin extended the date to 240 B.C. In ...
... enabled to trace back the period during which Halley's comet has been a member of the solar system , and to identify it in the Chinese observations of comets as far back as 12 B.C. Cowell and Cromellin extended the date to 240 B.C. In ...
Page 23
... enabling him to predict astronomical events . approximately . He improved the lunar theory con- siderably , and ... enabled Kepler to abolish these purely geometrical makeshifts , and to substitute a system in which the sun became ...
... enabling him to predict astronomical events . approximately . He improved the lunar theory con- siderably , and ... enabled Kepler to abolish these purely geometrical makeshifts , and to substitute a system in which the sun became ...
Page 34
... enabled him to attain his scientific aims , and which have been conspicuous in many of his successors . He studied in Germany , but King Frederick of Denmark , appreciating his great talents , invited him to carry out his life's work in ...
... enabled him to attain his scientific aims , and which have been conspicuous in many of his successors . He studied in Germany , but King Frederick of Denmark , appreciating his great talents , invited him to carry out his life's work in ...
Page 35
... enabled him to get the best result with stars of different bright- ness . The telescope not having been invented , he could not use a telescopic - sight as we now do in gunnery . This not only removes the difficulty of focussing , but ...
... enabled him to get the best result with stars of different bright- ness . The telescope not having been invented , he could not use a telescopic - sight as we now do in gunnery . This not only removes the difficulty of focussing , but ...
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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 nebulę 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