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The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1872)

White, Charles J. (Charles Joyce), 1839-1917 · Philadelphia, Claxton, Remsen & Haffelfinger · leaf 89

An illustration from The elements of theoretical and descriptive astronomy, for the use of colleges and academies, 1872, leaf 89 — n which the sun appears to move is called the ecliptic, and thetwo points in which it intersects the celestial equator are calledthe vernal and the autumnal equinox. Let Fig. 34 be a representation ofthe celestial sphere. EA Q Fis the equi-noctial, Pp is the axis of the sphere, andP the north pole.… … 84 DISTANCE OF THE SUN. where it has its greatest northern declination, on the 21st of June.This point is called the northern summer solstice. From this pointit moves eastward and southward, passes the autumnal equinoxA on the 21st of September, and reaches the point D, called thenorthern winter…

Astronomy

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