Outlines of Astronomy |
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Page xxiii
... station in general . Parallactic motions . Terrestrial parallax . That of the stars insensible . First step towards forming an idea of the distance of the stars . Copernican view of the Earth's motion . Relative motion . Motions partly ...
... station in general . Parallactic motions . Terrestrial parallax . That of the stars insensible . First step towards forming an idea of the distance of the stars . Copernican view of the Earth's motion . Relative motion . Motions partly ...
Page 12
... station from which we see all the rest , and as the only one among them to which we can , in the first instance , refer for any determinate marks and measures by which to recognize their changes of situation , or with which to compare ...
... station from which we see all the rest , and as the only one among them to which we can , in the first instance , refer for any determinate marks and measures by which to recognize their changes of situation , or with which to compare ...
Page 13
... station from which we view them , with ourselves , and all objects which immediately surround us , be not itself in motion , unperceived by us ; and if so , of what nature that motion is . The apparent places of a number of objects ...
... station from which we view them , with ourselves , and all objects which immediately surround us , be not itself in motion , unperceived by us ; and if so , of what nature that motion is . The apparent places of a number of objects ...
Page 17
... station for its centre . That this line is really a circle , we conclude , first , from the perfect apparent ... stations at different elevations above various points of its surface , represented by a , g , m respectively . From each of ...
... station for its centre . That this line is really a circle , we conclude , first , from the perfect apparent ... stations at different elevations above various points of its surface , represented by a , g , m respectively . From each of ...
Page 19
... station M we were to adjust a line ( a wooden ruler for instance ) by a spirit - level , with perfect exactness ; then , if we suppose the direction of this line indefinitely prolonged both ways , as XMY , the line so drawn will be at ...
... station M we were to adjust a line ( a wooden ruler for instance ) by a spirit - level , with perfect exactness ; then , if we suppose the direction of this line indefinitely prolonged both ways , as XMY , the line so drawn will be at ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical atmosphere attraction axis bright calculation celestial circle coincidence comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect ellipse 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 nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena phænomenon planet planetary pole portion position precession precisely proper motion proportion recede recess 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 whole zenith