Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page 21
... length the whole disappears : while yet the distinctness with which the last portion of the sail d is scen is such as to satisfy us that were it not for the interposed segment of the sea , ABCDE , the distance TE is not so great as to ...
... length the whole disappears : while yet the distinctness with which the last portion of the sail d is scen is such as to satisfy us that were it not for the interposed segment of the sea , ABCDE , the distance TE is not so great as to ...
Page 22
... length of the arch ―― - of the circle between D and b , viz . half the measured interval , and b B , the excess of its sccant above its radius — which is the height of B , data which , by the solution of an easy geometrical problem ...
... length of the arch ―― - of the circle between D and b , viz . half the measured interval , and b B , the excess of its sccant above its radius — which is the height of B , data which , by the solution of an easy geometrical problem ...
Page 35
... length remains the same . The dilated size ( generally ) of the sun or moon , when seen near the horizon , beyond what they appear to have when high up in the sky , has nothing to do with refraction . It is an illusion of the judgment ...
... length remains the same . The dilated size ( generally ) of the sun or moon , when seen near the horizon , beyond what they appear to have when high up in the sky , has nothing to do with refraction . It is an illusion of the judgment ...
Page 46
... length reach a line on the earth's surface , called the equator , at any point of which , indifferently , if he take up his station and recommence his observations , he will find that he has both the centres of diurnal motion in his ...
... length reach a line on the earth's surface , called the equator , at any point of which , indifferently , if he take up his station and recommence his observations , he will find that he has both the centres of diurnal motion in his ...
Page 86
... length . About the 21st of December , for example , it is half a minute longer , and about the same day of September nearly as much shorter , than its average duration . And thus a distinction is again pressed upon our notice betwen the ...
... length . About the 21st of December , for example , it is half a minute longer , and about the same day of September nearly as much shorter , than its average duration . And thus a distinction is again pressed upon our notice betwen the ...
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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 effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination increase inequality instance instrument interval 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 precisely proper motions proportion recede recess reckoned refraction remarkable render respect result revolution revolving right ascension ring 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