Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 120
... planet , & c . , the angular distance between which it is required to measure . This done , the threads are closed up by turning one of the screws till they exactly cover each other , and the number of turns and parts of a turn required ...
... planet , & c . , the angular distance between which it is required to measure . This done , the threads are closed up by turning one of the screws till they exactly cover each other , and the number of turns and parts of a turn required ...
Сторінка 180
... planet * ) — including the sun , moon , and planets , as well as the singular class of bodies termed comets , in whose apparent places among the stars , and among each other , the observation of a few days , or even hours , is ...
... planet * ) — including the sun , moon , and planets , as well as the singular class of bodies termed comets , in whose apparent places among the stars , and among each other , the observation of a few days , or even hours , is ...
Сторінка 244
... planet within the zone above described ( and , as seen from the surface of earth , even somewhat beyond it , by reason of parallax , which may throw it apparently nearly a degree either way from its place as seen from the centre ...
... planet within the zone above described ( and , as seen from the surface of earth , even somewhat beyond it , by reason of parallax , which may throw it apparently nearly a degree either way from its place as seen from the centre ...
Сторінка 277
... planet when mapped down by observation from day to day , will offer the E P R N appearance PQRS , & c . ; the motion ... planet crosses the ecliptic , as at N in the figure , it is said ( like the moon ) to be in its node ; and as the ...
... planet when mapped down by observation from day to day , will offer the E P R N appearance PQRS , & c . ; the motion ... planet crosses the ecliptic , as at N in the figure , it is said ( like the moon ) to be in its node ; and as the ...
Сторінка 278
... planet through the same node ( whether it be the ascending or the descending ) is always alike , whether the planet at the moment of such passage be direct or retrograde , swift or slow , in its apparent movement . ( 461. ) Here , then ...
... planet through the same node ( whether it be the ascending or the descending ) is always alike , whether the planet at the moment of such passage be direct or retrograde , swift or slow , in its apparent movement . ( 461. ) Here , then ...
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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.