The 12 houses of the zodiac for astrological forecasting are each 2,160 years in duration, determined by the precession rate of the earth’s axis, 72 years/degree, which was the means to have measured and mapped the earth quite precisely (see Page titled Great Pyramid for Navigation), nothing mystical about astrology only wishful thinking that the positions of the stars somehow affect our makeup and behavior, that therefore we don’t have to answer to our Creator Elohim.