Outlines of astronomy |
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Page xix
... light . Appearances resulting from diurnal motion . From change of station in general . Parallactic motions . Terrestrial parallax . That of the stars insensible . First step towards forming an idea of the distance of the stars ...
... light . Appearances resulting from diurnal motion . From change of station in general . Parallactic motions . Terrestrial parallax . That of the stars insensible . First step towards forming an idea of the distance of the stars ...
Page xxiv
... light in altering the apparent period of a binary star CHAPTER XVII . OF CLUSTERS OF STARS AND NEBULE . - Page 554 Of clustering groups of stars . Globular clusters . Their stability dyna- mically possible . List of the most remarkable ...
... light in altering the apparent period of a binary star CHAPTER XVII . OF CLUSTERS OF STARS AND NEBULE . - Page 554 Of clustering groups of stars . Globular clusters . Their stability dyna- mically possible . List of the most remarkable ...
Page 6
... lights as possible . It is a property of illustrations of this kind to strike no two minds in the same manner , or ... light by such a course -- some obscurity may be dissipated , some inward misgivings cleared up , or even some links ...
... lights as possible . It is a property of illustrations of this kind to strike no two minds in the same manner , or ... light by such a course -- some obscurity may be dissipated , some inward misgivings cleared up , or even some links ...
Page 32
... light of a luminous object that we see , but that whatever portion of its light which would not otherwise reach our eyes is intercepted in its course , and thrown back , or laterally , upon us , becomes to us a means of illumination ...
... light of a luminous object that we see , but that whatever portion of its light which would not otherwise reach our eyes is intercepted in its course , and thrown back , or laterally , upon us , becomes to us a means of illumination ...
Page 33
... light , nor any , direct or reflected , from all that part of its visible atmosphere which is below AP M ; but from the lenticular portion PR x , which is traversed by the sun's rays , and which lies above the visible horizon B R of B ...
... light , nor any , direct or reflected , from all that part of its visible atmosphere which is below AP M ; but from the lenticular portion PR x , which is traversed by the sun's rays , and which lies above the visible horizon B R of B ...
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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