Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page 13
... 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 ...
Page 20
... 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 ...
Page 34
... arise from this cause . ( 46. ) From the explanation we have given , in arts . 39 and 40 , of the nature of atmospheric refraction , and the mode in which it is produced in the progress of a ray of light through successive strata , or ...
... arise from this cause . ( 46. ) From the explanation we have given , in arts . 39 and 40 , of the nature of atmospheric refraction , and the mode in which it is produced in the progress of a ray of light through successive strata , or ...
Page 57
... 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 ...
Page 78
... arise in any strumental determination , we shall find them chiefly reducible to three principal heads : - in- ( 133. ) 1st , External or incidental causes of error ; com- prehending those which depend on external , uncontrollable ...
... arise in any strumental determination , we shall find them chiefly reducible to three principal heads : - in- ( 133. ) 1st , External or incidental causes of error ; com- prehending those which depend on external , uncontrollable ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical attraction axis bright calculation celestial circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination increase 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 phænomena planet planetary pole portion position precession precisely proper motions proportion recede recess reckoned refraction remarkable render respect result revolution revolving right ascension ring rotation round satellites Saturn seen sidereal sidereal day situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible whole zenith