History of Astronomy |
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Page v
... PAGE vii I 7 13 23 333 46 51 SUCCESSORS HALLEY , --- EULER , LA- 60 GRANGE , LAPLACE , ETC. 9. DISCOVERY OF NEW PLANETS HERSCHEL , PIAZZI , ADAMS , AND Le Verrier- 64 BOOK III . OBSERVATION IO . INSTRUMENTS OF PRECISION -
... PAGE vii I 7 13 23 333 46 51 SUCCESSORS HALLEY , --- EULER , LA- 60 GRANGE , LAPLACE , ETC. 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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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