Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 18
... zone — the angle YMQ , by which the visible horizon appear- depressed below the direction of a spirit - level- that is called • See these instruments described in Chap . III . viz . the line MN , increases ; and , 18 OUTLINES OF ASTRONOMY .
... zone — the angle YMQ , by which the visible horizon appear- depressed below the direction of a spirit - level- that is called • See these instruments described in Chap . III . viz . the line MN , increases ; and , 18 OUTLINES OF ASTRONOMY .
Сторінка 18
... , by which the visible horizon appears depressed below the direction of a spirit - level- that is called zone - See these instruments described in Chap . III . the dip of the horizon . It is a correction 18 OUTLINES OF ASTRONOMY .
... , by which the visible horizon appears depressed below the direction of a spirit - level- that is called zone - See these instruments described in Chap . III . the dip of the horizon . It is a correction 18 OUTLINES OF ASTRONOMY .
Сторінка 28
... described by the refracted ray is concave downwards , the tangent As will lie above A S , the unrefracted ray : consequently the object S will appear more elevated above the horizon A H , when seen through the refracting atmosphere ...
... described by the refracted ray is concave downwards , the tangent As will lie above A S , the unrefracted ray : consequently the object S will appear more elevated above the horizon A H , when seen through the refracting atmosphere ...
Сторінка 41
... described are not of the same magnitude for all the stars ; and that those described by different stars differ greatly in respect of the parts of them which lie above the horizon . Some , which lie towards the quarter of the horizon ...
... described are not of the same magnitude for all the stars ; and that those described by different stars differ greatly in respect of the parts of them which lie above the horizon . Some , which lie towards the quarter of the horizon ...
Сторінка 42
... described by those which rise exactly in the east point . Carrying his eye farther northwards , he will notice , at length , stars which , in their diurnal motion , just graze the horizon at its north point , or only dip below it for a ...
... described by those which rise exactly in the east point . Carrying his eye farther northwards , he will notice , at length , stars which , in their diurnal motion , just graze the horizon at its north point , or only dip below it for a ...
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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.