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- 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 makes ...
... enabled him to get the best result with stars of different bright- 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 makes ...
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Common terms and phrases
accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later LIBRARIES light lunar Mars mass mathematical mean measured method miles moon moon's motion move Newton noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed SIGILLUM solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY VERITAS