Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 51
at the vernal equinox, which is continuallyshifting along the ecliptic ; so that the signs are continuallymoving along the zodiac, while the constellations remainstationary : hence it has come about that the first point ofAries (the sign) is no longer in the constellation Aries, butin Pisces. 34… … Fig. 38. Since celestial longitude and right ascension are bothmeasured from the first point of Aries, the longitude andright ascension of the stars are slowly changing from vear
Astronomy
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