. Mathematics, compiled from the best authors and intended to be the text-book of the course of private lectures on these sciences in the University at Cambridge [microform]. ude of the place, the right ascension, and de-clination of a star ; to find when it rises and sets cosmi-cally, that is, at sunrise. Find the ascensional difference. Then, 1. The sum or difference of the ascensional difference andright ascension, according as the declination is south ornorth, is the oblique ascension. Let HZON be the me-ridian, HO the horizon,EQ. the equinoctial, LI theecliptic, and S the in the
. Mathematics, compiled from the best authors and intended to be the text-book of the course of private lectures on these sciences in the University at Cambridge [microform]. ude of the place, the right ascension, and de-clination of a star ; to find when it rises and sets cosmi-cally, that is, at sunrise. Find the ascensional difference. Then, 1. The sum or difference of the ascensional difference andright ascension, according as the declination is south ornorth, is the oblique ascension. Let HZON be the me-ridian, HO the horizon,EQ. the equinoctial, LI theecliptic, and S the in the oblique spher-ic triangle ABC, the dataare by the oblique ascen-sion AC, the angle ABC,the supplement of A EH,the height of the equinoc-tial, or complement of thelatitude, and the angleB AC, the obliquity of the ecliptic ; to find the side AB, andconsequently the point B of the ecliptic, that rises with thestar. Therefore find the day, when the sun is in this pointof the ecliptic, and the same day the star rises cosmically. 2. The sum or difference of the ascensional difference andright ascension, according as the declination is north or souib,the oblique SPHERIC ASTRONOMY.
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