Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 109
haut is 22h52m 88 ASTRONOMY. Suppose further that we had a way of knowing when a star wason our celestial meridian, that is, exactly south of us (and we havesuch a way, as will soon be seen), then if an observer noticed thatSirius was on his celestial meridian at a certain instant he would knowthat… … Fig. 51. The hour-angle of the vernal equinox, 0, in this figure is 6 hours west.The sidereal time is therefore 6 hours. The R.A of the observers merid-ian is 6 hours. the sidereal time at that instant). If the star Fomalhaut is on thecelestial meridian of an observer at another instant, the…
Astronomy
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