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 109
Moon.—The sidereal period of the moon is the time it takes her topass around from a star to that star again, or the time it takes her to makea complete revolutionaround the earth.This is a periodof about twenty-sevendays and a third. Itis sometimes calledthe sidereal month. The sxnodical peri-od of… … Fig. 1
Astronomy
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