History of Astronomy |
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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 63
... Halley's suggestion became an inspiration for the mathematical astronomer . Clairaut , assisted by Lalande , found that Saturn would retard the comet 100 days , Jupiter 518 days , and predicted its return to perihelion on April 13th ...
... Halley's suggestion became an inspiration for the mathematical astronomer . Clairaut , assisted by Lalande , found that Saturn would retard the comet 100 days , Jupiter 518 days , and predicted its return to perihelion on April 13th ...
Page 64
... Halley's comet reappeared in 1835 , Pontecou- lant's computations for the date of perihelion passage were very exact ... comet , going back to II B.C. , and most of these have been identified as being really Halley's comet by the ...
... Halley's comet reappeared in 1835 , Pontecou- lant's computations for the date of perihelion passage were very exact ... comet , going back to II B.C. , and most of these have been identified as being really Halley's comet by the ...
Page 122
... Halley's comet remained the only one of which a pre- diction of the return had been confirmed , until the orbit of the small , ill - defined comet found by Pons in 1819 was computed by Encke , and found to have a period of 33 years . It ...
... Halley's comet remained the only one of which a pre- diction of the return had been confirmed , until the orbit of the small , ill - defined comet found by Pons in 1819 was computed by Encke , and found to have a period of 33 years . It ...
Page 125
... comet 1866 - Schiaparelli having independently attained both of these results . Subsequently Weiss , of Vienna ... Halley's comet since November , 1907 , although its perihelion passage will not take place until April , 1910 . 15. The ...
... comet 1866 - Schiaparelli having independently attained both of these results . Subsequently Weiss , of Vienna ... Halley's comet since November , 1907 , although its perihelion passage will not take place until April , 1910 . 15. The ...
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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