Uttmark's guide to the United States local inspectors examination for masters and mates of ocean going steam and sailing ships (1919)
Uttmark, Fritz E · [New York] The Author · leaf 38
DEFINITIONS 26.—*What is Right Ascension? The Right Ascension of a celestial body is theangle at the Pole between thehour circle of the body andthat of the first point ofAries. It is measured fromthe first point of Aries East-ward extending up to 360° or24 hours. P is the Pole. A is the first point… … Fig. 24. (Fig. 24.) 27.~*What is Sidereal Time? Siderial Time is the hour angle of the firstpoint of Aries. This point which is identical with thevernal equinox, is the origin of all co-ordinates anddoes not, like the Sun, Moon and the planets have,actual or apparent motion therein. It shares in…
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