Outlines of Astronomy |
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Page 15
... remain at rest , and we leave them behind in the air . Still , the illusion , so far as massive objects and our own movements are concerned , remains complete ; and when we look at the shore , we then perceive the effect of our own ...
... remain at rest , and we leave them behind in the air . Still , the illusion , so far as massive objects and our own movements are concerned , remains complete ; and when we look at the shore , we then perceive the effect of our own ...
Page 21
... remain , presenting the appearance c . But if , in this state of things , the spectator quickly as- cends to a higher sta- tion , T , whose visible horizon is at D , the hull comes again in sight ; and , when he descends again , he ...
... remain , presenting the appearance c . But if , in this state of things , the spectator quickly as- cends to a higher sta- tion , T , whose visible horizon is at D , the hull comes again in sight ; and , when he descends again , he ...
Page 29
... remain constantly in the same vertical plane , S A C ' , passing through the eye , the object , and the earth's centre . ( 40. ) The effect of the air's refraction , then , is to raise all the heavenly bodies higher above the horizon in ...
... remain constantly in the same vertical plane , S A C ' , passing through the eye , the object , and the earth's centre . ( 40. ) The effect of the air's refraction , then , is to raise all the heavenly bodies higher above the horizon in ...
Page 35
... remains the same . The dilated size ( generally ) of the sun or moon , when seen near the horizon , beyond what they appear to have when high up in the sky , has nothing to do with refraction . It is an illusion of the judgment ...
... remains the same . The dilated size ( generally ) of the sun or moon , when seen near the horizon , beyond what they appear to have when high up in the sky , has nothing to do with refraction . It is an illusion of the judgment ...
Page 39
... remains constantly opposite to him , and immediately under his eye . ( 53. ) By such a rotation of the earth , then , as we have supposed , the horizon of a stationary spectator will be con- stantly depressing itself below those objects ...
... remains constantly opposite to him , and immediately under his eye . ( 53. ) By such a rotation of the earth , then , as we have supposed , the horizon of a stationary spectator will be con- stantly depressing itself below those objects ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical atmosphere attraction axis bright calculation celestial circle coincidence comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian micrometrical moon moon's nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena phænomenon planet planetary pole portion position precession precisely proper motion proportion recede recess refraction remarkable respect result revolution revolving right ascension 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