Celestial scenery, or, The Wonders of the planetary system displayed : illustrating the perfections of deity and a plurality of worlds (1845)
Dick, Thomas, 1774-1857, Parker, E. S., former owner. DSI, David H. DeVorkin Collection (Smithsonian Institution. Libraries) DSI · Philadelphia : Published by Edward C. Biddle · leaf 113
ppear from the following figures. (See Fig. XXVII.and XXVIII.) Let A B represent the plane of the ecliptic, or the earthsorbit, and C D (Fig. XXVIII.) the axis of the earth, inclinedat an angle of 66ri°to the ecliptic, and 23§° from the perpen-dicular E F, or the axis of the ecliptic, and it will… … perpendicular to the ecliptic. As the sun can enlighten onlythe one half of the globe at a time, it is evident that, if his rayscome in the direction from B, Fig. XXVIII., they cannot il-luminate both poles at once. While the north polar circle be-tween i? and Cis enlightened, the regions around…
Astronomy
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