Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 12
... arise , without the reality . If , then , such be actually the case , it will follow that all the movements we think we perceive among the stars will not be real movements , but that some part , at least , of whatever changes of ...
... arise , without the reality . If , then , such be actually the case , it will follow that all the movements we think we perceive among the stars will not be real movements , but that some part , at least , of whatever changes of ...
Сторінка 19
... arise from the inability of the eye to follow objects to a greater distance , or from at- mospheric indistinctness . It will be worth while to pursue the general notion thus acquired into some of its consequences , by which its ...
... arise from the inability of the eye to follow objects to a greater distance , or from at- mospheric indistinctness . It will be worth while to pursue the general notion thus acquired into some of its consequences , by which its ...
Сторінка 56
... arise in an object , could any observer suddenly transport himself to the centre of the earth , is evidently the angle C S P , subtended at the object S by that radius CP of the earth which joins its centre and the place P of ...
... arise in an object , could any observer suddenly transport himself to the centre of the earth , is evidently the angle C S P , subtended at the object S by that radius CP of the earth which joins its centre and the place P of ...
Сторінка 77
... arise in any in- strumental determination , we shall find them chiefly reducible to three principal heads : - ( 133. ) 1st , External or incidental causes of error ; com- prehending such as depend on external , uncontrollable cir ...
... arise in any in- strumental determination , we shall find them chiefly reducible to three principal heads : - ( 133. ) 1st , External or incidental causes of error ; com- prehending such as depend on external , uncontrollable cir ...
Сторінка 78
... arise from an instrument not being what it professes to be , which is error of workmanship . Thus , if a pivot or axis , instead of being , as it ought , exactly cylin- drical , be slightly flattened , or elliptical , if it be not ...
... arise from an instrument not being what it professes to be , which is error of workmanship . Thus , if a pivot or axis , instead of being , as it ought , exactly cylin- drical , be slightly flattened , or elliptical , if it be not ...
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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.