Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 106
clockso that its hands shall mark 0 hours 0 minutes 0 seconds SIDEREAL TIME. 85 at the instant the vernal equinox is on the celestial merid-ian of the place; and the clock is regulated so that exactly24 hours of its time elapses during one revolution of theEarth on its axis. In this figure PZCS is… … Pig. 48.—Measurement op Sidereal Time. Suppose that there were a very bright star exactly at V. (There isno star exactly at the vernal equinox.) Such a star would rise (at E)\culminate (at 0); and set (at W). When it is on the celestial merid-ian of the observer its hour-angle is Oh Om 0s (at C).…
Astronomy
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