Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page xxiv
... Equinoctial time . Fixation of ancient dates by eclipses 666 APPENDIX . I. Lists of Northern and Southern Stars , with their approximate Magnitudes , on the Vulgar and Photometric Scale II . Synoptic Table of the Elements of the ...
... Equinoctial time . Fixation of ancient dates by eclipses 666 APPENDIX . I. Lists of Northern and Southern Stars , with their approximate Magnitudes , on the Vulgar and Photometric Scale II . Synoptic Table of the Elements of the ...
Page 61
... equinoctial , is a great circle of the celestial sphere , marked out by the indefinite extension of the plane of the terrestrial equator . ( 98. ) DEF . 15. The celestial horizon of any place is a great circle of the sphere marked out ...
... equinoctial , is a great circle of the celestial sphere , marked out by the indefinite extension of the plane of the terrestrial equator . ( 98. ) DEF . 15. The celestial horizon of any place is a great circle of the sphere marked out ...
Page 63
... equinoctial or celestial equator , or the complement to 90 ° of its angular distance from the nearest pole , which ... equinoctial . The hour circle , passing through any particular heavenly body , serves to refer it to a point in the ...
... equinoctial or celestial equator , or the complement to 90 ° of its angular distance from the nearest pole , which ... equinoctial . The hour circle , passing through any particular heavenly body , serves to refer it to a point in the ...
Page 64
... equinoctial is determined , will be explained further on . ( 109. ) The right ascensions of celestial objects are always reckoned eastwards from the equinox , and are estimated either in degrees , minutes , and seconds , as in the case ...
... equinoctial is determined , will be explained further on . ( 109. ) The right ascensions of celestial objects are always reckoned eastwards from the equinox , and are estimated either in degrees , minutes , and seconds , as in the case ...
Page 65
... equinoctial ; that what are me- ridians on the earth are called hour circles in the heavens , and the angles they include between them at the poles are called hour angles . All this is convenient and intelligible ; and had they been ...
... equinoctial ; that what are me- ridians on the earth are called hour circles in the heavens , and the angles they include between them at the poles are called hour angles . All this is convenient and intelligible ; and had they been ...
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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