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Strategies & Market Trends : Fibonacci Dynamics

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To: sammy™ -_- who wrote (176)	3/11/2007 12:13:39 AM
From: sammy™ -_-	Read Replies (1) of 330

69 Beyond Ordinary Least Square [OLS] Historical detour: origin of OLS in astrometry Ushered in by Tycho Brache (1546-1601), the era of accurate astrometry (measurement of positions of things in the sky) was well underway by the 1700s. In 1740 the astronomer Jacques Cassini compiled the below list of observations of the tilt of the Earth's equator compared to the plane of the Earth's orbit about the Sun ("obliquity of ecliptic"). The list seems to demonstrate that the obliquity slowly has decreased from almost 24° to about 23½° during the nearly 2,000 years covered. Date Obliquity 140 B.C. 23.853 ° 140 23.856 390 A.D. 23.500 880 23.583 1070 23.567 1300 23.533 1460 23.500 1500 23.473 1500 23.488 1570 23.499 1570 23.525 1600 23.517 1656 23.484 1672 23.482 1738 23.472 ---

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