Outlines of astronomy |
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Page x
... latter of these eminent geometers , as well as to my excellent and esteemed friend the Astro- nomer Royal , I have to return my best thanks for communications which would have effectually re- lieved some doubts I at one period ...
... latter of these eminent geometers , as well as to my excellent and esteemed friend the Astro- nomer Royal , I have to return my best thanks for communications which would have effectually re- lieved some doubts I at one period ...
Page 5
... latter predicament , —I trust the number will be few ) , that its utmost pretension is to place them on the threshold of this particular wing of the temple of Science , or rather on an eminence exterior to it , whence they may obtain ...
... latter predicament , —I trust the number will be few ) , that its utmost pretension is to place them on the threshold of this particular wing of the temple of Science , or rather on an eminence exterior to it , whence they may obtain ...
Page 36
... latter , as will be ex- plained farther on . ( 48. ) After what has been said of the small extent of the atmosphere in comparison with the mass of the earth , we shall have little hesitation in admitting those luminaries which people ...
... latter , as will be ex- plained farther on . ( 48. ) After what has been said of the small extent of the atmosphere in comparison with the mass of the earth , we shall have little hesitation in admitting those luminaries which people ...
Page 37
... latter . ( 50. ) A spectator on the earth's surface is prevented , by the great mass on which he stands , from seeing into all that portion of space which is below him , or to see which he must look in any degree downwards . It is true ...
... latter . ( 50. ) A spectator on the earth's surface is prevented , by the great mass on which he stands , from seeing into all that portion of space which is below him , or to see which he must look in any degree downwards . It is true ...
Page 39
... latter , only that portion of it which 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 ...
... latter , only that portion of it which 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 ...
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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 Julian period 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 proper motions proportion recede reckoned 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 vols whole zenith