The Geography of the Heavens, and Class Book of Astronomy; Accompanied by a Celestial Atlas |
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Page x
... equal parts , now called the signs of the Zodiac , which they distinguished by names correspond- ing to certain objects and operations connected with the different seasons of the year . Such were the means requisite to be used for ...
... equal parts , now called the signs of the Zodiac , which they distinguished by names correspond- ing to certain objects and operations connected with the different seasons of the year . Such were the means requisite to be used for ...
Page xi
... equal parts , the motions on which we fix as standards of time must be constant and uniform , or at least , that any slight de- viation from uniformity shall be capable of being ascertained . But we have no uniform motion on earth by ...
... equal parts , the motions on which we fix as standards of time must be constant and uniform , or at least , that any slight de- viation from uniformity shall be capable of being ascertained . But we have no uniform motion on earth by ...
Page 27
... equal arcs of 30 ° each , called signs , which the ancients distinguished by particular names . This division commences at the vernal equinox , and is continued east- wardly round to the same point again , in the following order : Aries ...
... equal arcs of 30 ° each , called signs , which the ancients distinguished by particular names . This division commences at the vernal equinox , and is continued east- wardly round to the same point again , in the following order : Aries ...
Page 28
... equal to the obliquity of the ecliptic , which , in round numbers , is 23c ° ; but as we have seen the obliquity of the ecliptic is continually changing ; therefore the position of the tropics inust make a correspondent change . The ...
... equal to the obliquity of the ecliptic , which , in round numbers , is 23c ° ; but as we have seen the obliquity of the ecliptic is continually changing ; therefore the position of the tropics inust make a correspondent change . The ...
Page 45
... equal parts , was both simple and ingenious . Having no instrument that would measure time exactly , " They took a vessel , with a small hole in the bottom , and having filled it with water , suffered the same to distil , drop by drop ...
... equal parts , was both simple and ingenious . Having no instrument that would measure time exactly , " They took a vessel , with a small hole in the bottom , and having filled it with water , suffered the same to distil , drop by drop ...
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Common terms and phrases
3d magnitude 4th magnitude ancient angle appear Arcturus Argo Navis Aries astronomers Auriga axis Beta brightest called Cassiopeia celestial centre Cepheus circle cluster colure comet constellation Cor Caroli declination degree Delta Denebola Describe diameter direction distinguished diurnal motion Earth east ecliptic equal equator equinoctial figure fixed stars Gamma globe head heavenly bodies heavens Hercules Herschel horizon Jupiter latitude length Libra light longitude mean distance Mercury meridian millions of miles minutes Moon Moon's motion naked eye nearly nebulæ night node north pole northern hemisphere observed orbit Orion parallax passing perihelion period Perseus phenomena planets Pleiades polar star position principal star represented revolution revolve right ascension rise satellites Saturn seasons seen side sidereal Sirius situated small stars solar system solstice southern spots Sun's supposed surface Taurus telescope tion triangle Ursa Venus vernal equinox Virgo visible whole number Zeta Zodiac