Outlines of astronomy |
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Page 32
... bright line in the air : and even if it be stifled , or let out through an opposite crevice , the light scattered through the apartment from this source is sufficient to prevent entire darkness in the room . The luminous lines ...
... bright line in the air : and even if it be stifled , or let out through an opposite crevice , the light scattered through the apartment from this source is sufficient to prevent entire darkness in the room . The luminous lines ...
Page 36
... bright , to be nearer to him than the smaller and less brilliant ; but , independent of other means of judging , he would have no warrant for this opinion , any more than for the idea that all were equidistant from him , and really ...
... bright , to be nearer to him than the smaller and less brilliant ; but , independent of other means of judging , he would have no warrant for this opinion , any more than for the idea that all were equidistant from him , and really ...
Page 37
... bright , may owe that apparent equality to its greater proximity , and may be really much less ; while both the moon and sun may only appear larger and brighter than the stars , on account of the remoteness of the latter . ( 50. ) A ...
... bright , may owe that apparent equality to its greater proximity , and may be really much less ; while both the moon and sun may only appear larger and brighter than the stars , on account of the remoteness of the latter . ( 50. ) A ...
Page 43
... bright star , called the Pole Star , which is easily recognized by the very small circle it describes ; so small , indeed , that , without paying particular attention , and referring its position very nicely to some fixed mark , it may ...
... bright star , called the Pole Star , which is easily recognized by the very small circle it describes ; so small , indeed , that , without paying particular attention , and referring its position very nicely to some fixed mark , it may ...
Page 45
... bright stars as pass the zenith may even be discerned by the naked eye ; and we have ourselves heard it stated by a celebrated optician , that the earliest circumstance which drew his attention to astronomy was the regular appearance ...
... bright stars as pass the zenith may even be discerned by the naked eye ; and we have ourselves heard it stated by a celebrated optician , that the earliest circumstance which drew his attention to astronomy was the regular appearance ...
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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 Edition effect 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 motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena planet planetary pole portion position precession proper motions proportion recede recess reckoned refraction remarkable respect result revolution 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 vols whole zenith