Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка xii
... exact dimensions . Its form that of equilibrium modified by centrifugal force . Variation of gravity on its surface . Statical and dynamical measures of gravity . The pendulum . Gravity to a spheroid . Other effects of the Earth's ...
... exact dimensions . Its form that of equilibrium modified by centrifugal force . Variation of gravity on its surface . Statical and dynamical measures of gravity . The pendulum . Gravity to a spheroid . Other effects of the Earth's ...
Сторінка 20
... exact distance of two stations which could barely be discerned from each other over the edge of the horizon , we could ascertain the actual size of the earth itself : and , in fact , were it not for the effect of refraction , by which ...
... exact distance of two stations which could barely be discerned from each other over the edge of the horizon , we could ascertain the actual size of the earth itself : and , in fact , were it not for the effect of refraction , by which ...
Сторінка 21
... exact horizontal interval a Db , by measurement ; then it is clear that D , the visible horizon of both , will lie just half - way between them , and if we sup- pose a Db to be the sphere of the earth , and C its centre in the figure ...
... exact horizontal interval a Db , by measurement ; then it is clear that D , the visible horizon of both , will lie just half - way between them , and if we sup- pose a Db to be the sphere of the earth , and C its centre in the figure ...
Сторінка 28
... exact estimation of the amount of atmospheric refraction , or the strict determination of the angle SA s , by which a celestial object at any assigned altitude , HA S , is raised in appearance above its true place , is , unfortunately ...
... exact estimation of the amount of atmospheric refraction , or the strict determination of the angle SA s , by which a celestial object at any assigned altitude , HA S , is raised in appearance above its true place , is , unfortunately ...
Сторінка 47
... exact correspondence with its near proximity . A similar remark applies to the south pole of the earth , which , however , is more unap- proachable , or , at least , has been less nearly approached , than the north . ( 67. ) The above ...
... exact correspondence with its near proximity . A similar remark applies to the south pole of the earth , which , however , is more unap- proachable , or , at least , has been less nearly approached , than the north . ( 67. ) The above ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
angle angular appear apsides ascertained astronomical axis bright calculation celestial centre circle comet curve described diameter difference direction disc distance disturbed 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 inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations planet planetary pole portion position Post 8vo precession proper motions proportion recede recess reckoned refraction respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole Woodcuts zenith
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Сторінка 674 - A Dictionary of Science, Literature, and Art : Comprising the History, Description, and Scientific Principles of every Branch of Human Knowledge ; with the Derivation and Definition of all the Terms in General Use. Edited by WT BRANDE, FRSL and E.