Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 35
John Frederick William Herschel, Sir John Frederick William Herschel. former situation as compared with the latter , as will be ex- plained farther on . ( 48. ) After what has been said of the small extent of the atmosphere in comparison ...
John Frederick William Herschel, Sir John Frederick William Herschel. former situation as compared with the latter , as will be ex- plained farther on . ( 48. ) After what has been said of the small extent of the atmosphere in comparison ...
Сторінка 38
... former case , he will see every part , but , in the latter , only that portion of it which remains constantly opposite to him , and immediately under his eye . ( 53. ) By such a rotation of the earth , then , as we have supposed , the ...
... former case , he will see every part , but , in the latter , only that portion of it which remains constantly opposite to him , and immediately under his eye . ( 53. ) By such a rotation of the earth , then , as we have supposed , the ...
Сторінка 87
... former , to January 2 days 1 hour of the latter reckoning . This usage has its advantages and disadvantages , but the latter seem to preponderate ; and it would be well if , in con- sequence , it could be broken through , and the civil ...
... former , to January 2 days 1 hour of the latter reckoning . This usage has its advantages and disadvantages , but the latter seem to preponderate ; and it would be well if , in con- sequence , it could be broken through , and the civil ...
Сторінка 88
... former are alone used in modern astronomy . The hour - glass is a coarse and rude contrivance for measuring , or rather counting out , fixed portions of time , and is entirely disused . The clepsydra , which measured time by the gradual ...
... former are alone used in modern astronomy . The hour - glass is a coarse and rude contrivance for measuring , or rather counting out , fixed portions of time , and is entirely disused . The clepsydra , which measured time by the gradual ...
Сторінка 93
... former adjust- ment , the axis can be rendered precisely horizontal , by level- ling it with a level made to rest on the pivots . By the latter adjustment the axis is brought precisely into the east and west direction , the criterion of ...
... former adjust- ment , the axis can be rendered precisely horizontal , by level- ling it with a level made to rest on the pivots . By the latter adjustment the axis is brought precisely into the east and west direction , the criterion of ...
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amount angle angular appear apsides ascertained astronomical axis bright calculation celestial centre circle comet curve degree described diameter difference direction disc distance disturbing body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe heavens heliocentric horizon inclination increase inequality instance interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian micrometrical moon moon's motion nearly nebula node normal force nutation object observed orbit parallax perigee perihelion period perturbations planet planetary pole portion position Post 8vo precession proper motion proportion recede recess refraction remarkable respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole Woodcuts zenith