Outlines of astronomy |
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Page 1
... and logical argument , even should it prove of a nature adverse to notions he may have previously formed for himself , or taken up , without examination , on the credit of B As a others . Such an effort is , in fact , INTRODUCTION :
... and logical argument , even should it prove of a nature adverse to notions he may have previously formed for himself , or taken up , without examination , on the credit of B As a others . Such an effort is , in fact , INTRODUCTION :
Page 2
... fact , a commencement of that intellectual discipline which forms one of the most important ends of all science . It is the first movement of approach towards that state of mental purity which alone can fit us for a full and steady ...
... fact , a commencement of that intellectual discipline which forms one of the most important ends of all science . It is the first movement of approach towards that state of mental purity which alone can fit us for a full and steady ...
Page 19
... fact , that in all situations , in every part of the earth , the direction of a plumb - line is exactly perpendicular to the surface of still water ; and , moreover , that it is also exactly perpendicular to a line or surface truly ...
... fact , that in all situations , in every part of the earth , the direction of a plumb - line is exactly perpendicular to the surface of still water ; and , moreover , that it is also exactly perpendicular to a line or surface truly ...
Page 52
... fact , and conclusions thence deducible , from what we should B hold , were we to rely in all cases on the mere judgment of the eye . To so great a nicety have such observations been carried by the aid of an instrument called a ...
... fact , and conclusions thence deducible , from what we should B hold , were we to rely in all cases on the mere judgment of the eye . To so great a nicety have such observations been carried by the aid of an instrument called a ...
Page 86
... facts , almost no apparatus is required . An observer need only station himself to the north of some well - defined vertical object ... fact , we are led to attend more nicely to the times of the daily arrival of the sun on the meridian ...
... facts , almost no apparatus is required . An observer need only station himself to the north of some well - defined vertical object ... fact , we are led to attend more nicely to the times of the daily arrival of the sun on the meridian ...
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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 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