Outlines of astronomy |
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Page xx
... magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Effect of excentricity of the orbit and position of its axis ...
... magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Effect of excentricity of the orbit and position of its axis ...
Page xxiii
... magnitudes . Photometric scale of magnitudes . Conventional or vulgar scale . Photometric comparison of stars . Distribution of stars over the heavens . Of the Milky Way or galaxy . Its supposed form that of a flat stratum partially ...
... magnitudes . Photometric scale of magnitudes . Conventional or vulgar scale . Photometric comparison of stars . Distribution of stars over the heavens . Of the Milky Way or galaxy . Its supposed form that of a flat stratum partially ...
Page 2
... magnitude to the earth itself , the other im- mensely surpassing it . The planets , which appear only as stars somewhat brighter than the rest , are to him spacious , elaborate , and habitable worlds ; several of them much greater and ...
... magnitude to the earth itself , the other im- mensely surpassing it . The planets , which appear only as stars somewhat brighter than the rest , are to him spacious , elaborate , and habitable worlds ; several of them much greater and ...
Page 23
... magnitude ; and it will not be amiss , if we take advantage of it to compare it with objects we have been accustomed to consider as of vast size , so as to interpose a few steps between it and our ordinary ideas of dimension . We have ...
... magnitude ; and it will not be amiss , if we take advantage of it to compare it with objects we have been accustomed to consider as of vast size , so as to interpose a few steps between it and our ordinary ideas of dimension . We have ...
Page 42
... magnitude for all the stars ; and that those described by different stars differ greatly in respect of the parts of them which lie above the horizon . Some , which lie towards the quarter of the horizon which is denominated the SOUTH ...
... magnitude for all the stars ; and that those described by different stars differ greatly in respect of the parts of them which lie above the horizon . Some , which lie towards the quarter of the horizon which is denominated the SOUTH ...
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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