Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 45
... equator , at any point of which , indifferently , if he take up his station and recommence his observations , he will find that he has both the centres of diurnal motion in his horizon , occupying op- posite points , the northern Pole ...
... equator , at any point of which , indifferently , if he take up his station and recommence his observations , he will find that he has both the centres of diurnal motion in his horizon , occupying op- posite points , the northern Pole ...
Сторінка 46
... equator ) the whole sphere will have passed in review over him - the whole hemisphere with which he began his night's observation will have been carried down beneath . him , and the entire opposite one brought up from below . ( 65. ) If ...
... equator ) the whole sphere will have passed in review over him - the whole hemisphere with which he began his night's observation will have been carried down beneath . him , and the entire opposite one brought up from below . ( 65. ) If ...
Сторінка 57
... equator is a great circle on its surface , equidistant from its poles , dividing it into two hemi- spheres a northern and a southern ; in the midst of which are situated the respective poles of the earth of those names . The plane of ...
... equator is a great circle on its surface , equidistant from its poles , dividing it into two hemi- spheres a northern and a southern ; in the midst of which are situated the respective poles of the earth of those names . The plane of ...
Сторінка 58
... equator , measured on its own terrestrial meridian : it is reckoned in degrees , minutes , and seconds , from 0 up to 90 ° , and northwards or southwards ac- cording to the hemisphere the place lies in . Thus , the obser- vatory at ...
... equator , measured on its own terrestrial meridian : it is reckoned in degrees , minutes , and seconds , from 0 up to 90 ° , and northwards or southwards ac- cording to the hemisphere the place lies in . Thus , the obser- vatory at ...
Сторінка 59
... equator , over every point of which respectively , the sun in its diurnal course passes vertically on the 21st of March and the 21st of September in every year . Their latitudes are about 23 ° 28 ' respectively , north and south . ( 94 ...
... equator , over every point of which respectively , the sun in its diurnal course passes vertically on the 21st of March and the 21st of September in every year . Their latitudes are about 23 ° 28 ' respectively , north and south . ( 94 ...
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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.