History of Astronomy |
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Page v
... - 23 33 46 TATION 51 8. NEWTON'S SUCCESSORS HALLEY , EULER , LA- GRANGE , LAPLACE , ETC. 60 9. DISCOVERY OF NEW PLANETS - HERSCHEL , PIAZZI , ADAMS , AND LE VERRIER- 64 BOOK III . OBSERVATION IO . INSTRUMENTS OF PRECISION -
... - 23 33 46 TATION 51 8. NEWTON'S SUCCESSORS HALLEY , EULER , LA- GRANGE , LAPLACE , ETC. 60 9. DISCOVERY OF NEW PLANETS - HERSCHEL , PIAZZI , ADAMS , AND LE VERRIER- 64 BOOK III . OBSERVATION IO . INSTRUMENTS OF PRECISION -
Page 5
... 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 the same way the comet 1861.i. has been traced ...
... 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 the same way the comet 1861.i. has been traced ...
Page 19
George Forbes. to get an accurate value of the moon's mean motion . [ Halley , in 1693 , compared this value with his own . measurements , and so discovered the acceleration of the moon's mean motion . This was conclusively estab- lished ...
George Forbes. to get an accurate value of the moon's mean motion . [ Halley , in 1693 , compared this value with his own . measurements , and so discovered the acceleration of the moon's mean motion . This was conclusively estab- lished ...
Page 51
... Halley , and many others . All of these men felt a repugnance to accept the idea of a force acting across the empty void of space . Descartes ( 1596-1650 ) proposed an ethereal medium whirling round the sun with the planets , and having ...
... Halley , and many others . All of these men felt a repugnance to accept the idea of a force acting across the empty void of space . Descartes ( 1596-1650 ) proposed an ethereal medium whirling round the sun with the planets , and having ...
Page 58
... . The name of Edmund Halley , Second Astronomer Royal , must ever be held in repute , not only for his own discoveries , but for the part he played in urging Newton to commit to writing , and present to the 58 THE DYNAMICAL PERIOD.
... . The name of Edmund Halley , Second Astronomer Royal , must ever be held in repute , not only for his own discoveries , but for the part he played in urging Newton to commit to writing , and present to the 58 THE DYNAMICAL PERIOD.
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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