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Topic: Saros cycle

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	NASA - Eclipses and the Saros
		Because the saros period is not equal to a whole number of days, its biggest drawback is that subsequent eclipses are visible from different parts of the globe.
		In the case of Saros 145, the peak occurs with the eclipse of 2342 Mar 08 (gamma=0.008).
		The saros cycle for lunar eclipses operates analogously with the solar eclipse saros.
	sunearth.gsfc.nasa.gov /eclipse/SEsaros/SEsaros.html (1235 words)

	Saros cycle - Wikipedia, the free encyclopedia
		A Saros cycle is a period of 6585 + 1/3 days (approximately 18 years 10 days and 8 hours) which can be used to predict eclipses of the Sun and the Moon.
		Therefore the circumstances of an eclipse are also very similar to an eclipse one Saros earlier and an eclipse (which happens when a conjunction or opposition of the Sun and Moon occurs in one of the nodes, that is, crossing the plane of the orbit) occurs again one Saros later.
		The name "Saros" was first given to the eclipse cycle by Edmund Halley in 1691, who took it from the Suda, a Byzantine lexicon of the 11th century.
	en.wikipedia.org /wiki/Saros (657 words)

	NASA - Eclipse 99 - Amazing Facts
		The Saros Cycle exists because it takes 18 years and 10 days for the entire orbit of the Moon to precess once around in its orbit plane so that the lunar nodes make one complete revolution along the orbit.
		Because the true length of the Saros Cycle is 6,585.32 days, you have to wait THREE Saros Cycles in order for an eclipse to repeat at the same spot on Earth.
		Twelve different Grand Saros eclipse series are now occurring, with the one producing the eclipses of 1937, 1955, 1973, 1991, and 2009 having durations near the 7.5 minute limit.
	eclipse99.nasa.gov /pages/amazing.html (557 words)

	Saros cycle -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-18)
		Every saros the Sun, the (The 3rd planet from the sun; the planet on which we live) Earth and the Moon return to approximately the same places and therefore almost identical solar and lunar eclipses repeat one saros apart.
		Therefore a longer cycle of three Saroses (54 years and exactly 31 days), known as a Triple Saros or exeligmos ((Click link for more info and facts about Greek) Greek: "turn of the wheel"), has been used.
		The name "Saros" was first given to the eclipse cycle by (English astronomer who used Newton's laws of motion to predict the period of a comet (1656-1742)) Edmund Halley in 1691, who took it from the (Click link for more info and facts about Suda) Suda, a Byzantine lexicon of the 11th century.
	www.absoluteastronomy.com /encyclopedia/s/sa/saros_cycle.htm (679 words)

	Saros-Inex Panorama of Solar Eclipses
		He arranged 8000 solar eclipses in a soros-inex panorama, grouping the eclipses column by column according to saros intervals, and line by line according to inex intervals.
		In fact, each saros series lasts 12 to 15 centuries, and produces 69 to 86 eclipses, separated by one saros period (6585.32 days).
		Inex series have a longer lifetime than saros series, because the shift of the moon with respect to the node of its orbit is much smaller for the inex (0.040° per cycle) than for the saros (0.478° per cycle), and the inex period (29 years) is longer than the saros (18 years).
	www.jgiesen.de /saros/panorama.html (599 words)

	Saros Cycle (Site not responding. Last check: 2007-10-18)
		Saros cycle is one of the most important and famous eclipse cycles found so far.
		In the Saros cycle, if a total solar eclipse occurs one day, then after 6585 days, a similar eclipse almost of the same nature, at the same location in the sky will take place.
		In fact, because the above cycles are out of step by a fraction of a day and the Saros cycle is 18 years 11 1/3 days, each subsequent eclipse in that Saros cycle occurs 120 ° west from the previous eclipse.
	www.khagolmandal.com /eclipses/saros_cycle.htm (497 words)

	Eclipses (Site not responding. Last check: 2007-10-18)
		Saros: To meet the conditions of a similar (solar) eclipse, integral numbers of synodic, nodical and anomalistic months must contain the same number of whole days.
		The result is the saros, a period of 18 years, 10 or 11 days (depending upon the number of leap years during that period) in which an eclipse with similar circumstances will repeat itself.
		A saros cycle begins with eclipses occurring at one of the poles.
	www.astronomy.org /astronomy-survival/eclipse.html (1238 words)

	NASA TP 2001-209990: Saros History (Site not responding. Last check: 2007-10-18)
		The periodicity and recurrence of solar (and lunar) eclipses is governed by the Saros cycle, a period of approximately 6,585.3 days (18 years 11 days 8 hours).
		The total eclipse of 2002 December 04 is the twenty-second member of Saros series 142 (Table 19), as defined by van den Bergh [1955].
		Saros 142 is a young series which began with a small partial eclipse at high southern latitudes on 1624 Apr 17.
	umbra.nascom.nasa.gov /eclipse/20021204/text/saros-history.html (573 words)

	Chapter 1: PREDICTABLE PERIODIC EVENTS-PART II
		SAROS Cycle of Eclipses is perhaps the most familiar periodic cycle in astronomy.
		Simply stated, the SAROS Cycle is the result of a nearly perfect common integral number of synodic, nodical and anomalistic months.
		The moon is displaced 0.9 degrees with respect to its node (12% of the metonic cycle displacement).
	climate.gi.alaska.edu /Curtis/astro2.html (2497 words)

	The Saros Interval
		The term is known as the "Saros" and refers to an interval of 223 lunar months after which the earth, sun and moon return – almost exactly – to their same relative positions.
		After three saros cycles – 54 years 34 days the eclipse would be back to its original longitude, but it would have shifted, on the average, about 6 miles (1,000 km) northward or southward, taking totality and even major partiality out of view for the original observer.
		A saros period truly does predict with accuracy that a solar eclipse will happen, but it would have been extremely hard for an ancient astronomer to confirm that the predicted eclipse had taken place and thus difficult for the astronomer or those he served to retain confidence in his solar eclipse predictions.
	users.bigpond.net.au /bkolberg/studies/saros.html (4992 words)

	A Catalogue of Eclipse Cycles (Site not responding. Last check: 2007-10-18)
		With these cycles he devised simple recipes, to be used together with Von Oppolzer’s eclipse catalogue, to predict the circumstances of lunar and solar eclipses occurring before or after the period spanned by Von Oppolzer’s tables.
		The Saros cycle is a successful eclipse series as its period of 223 synodic months not only closely approximates 242 draconic months but also because the number of anomalistic returns of the Sun (18.029) and the Moon (238.992) are nearly whole numbers.
		Lynn, W.T., “The Chaldæan Saros”, The Observatory, 12 (1889), 261-262.
	www.phys.uu.nl /~vgent/calendar/eclipsecycles.htm (5388 words)

	Eclipse · Astrological definition of Eclipse · Astrology Encyclopedia
		The Saros cycle is generally stated by astronomers to consist of 29 Solar eclipses in 1260y and 41 Lunar eclipses in 865y, making a total of 70 eclipses, on an average, for one complete series.
		The 15-year Solar cycle of the Chaldeans was a slightly different cycle: largely a chronological point of reference, arrived at by dividing the 360 degrees of the circle into 24 hourly segments of 15 degrees.
		This cycle was adopted by the Romans as the period of reappraisals for taxation, and became known as the Indiction cycle.
	www.astrologyweekly.com /dictionary/eclipse.php (2423 words)

	Saros (Site not responding. Last check: 2007-10-18)
		By using 118/9=13.111111 cycles (61 ratio days) this forms the outer balancing cycle* in the zodiac constelation circle creating the idea and concept of a 1=(2*.5) differencial measure of a god, which forms a initial TRIO of gods, a OPTIMISER=devider, destroyer, ballancer and builder.
		This central 72/9=8hr time cycle involving the period of Enoch is missing in the bible text but it can be seen in the genesis image forming the AXIS and inital central cycle structure, matching the quarter sector time period of Enoch=45deg/arc/angle which creates and builds the "luminaries" linked with the DOT=39 and BLOT=49 (39+45+49)=133/7"days"=19 cycles.
		These Saros cycles which (there are many of) are illustrated on the NASA webpage and are illustrated in picture image form in the genesis image as condensed/compiled zodiac constellations producing various "creation" stories according to culture, but only one cycle forms the correct balance which is the 129 cycle.
	homepage.ntlworld.com /calendar.creations/saros.html (382 words)

	Saros
		This is not to say that we would only expect an eclipse every 18 years, because actually there are at any one time between 50 and 70 cycles of saros going on.
		Each cycle having 70 to 90 observer events and then decaying, becoming just another full or new moon as are more than 7/8 ths of all lunar orbits.
		During one SAROS cycles about 70 eclipses, (some 1260 years), of the solar, usually 10 are total and 31 partial and 29 are lunar.
	www.geocities.com /jayatea.geo/saros.html (556 words)

	Re: Stonehenge et al (75-stone model)
		We know this cycle as the nineteen-year Metonic cycle, but use is made here of its lesser known property of also being a fairly good short-term eclipse cycle (38 to 57 years in duration).
		A 235 full-moon cycle (of nineteen solar years) can be seen to be reemphasised by the nineteen bluestones later erected, in a horseshoe inside the five sarsen trilithons.
		This (the greater utility of the "Saros" cycle for eclipse prediction) and the examination of similar numerical developments in Babylonian and Mayan astronomy lead directly to a consideration of the 73-stone sarsen model.
	www.hermetic.ch /cal_stud/cassidy/ston03.htm (526 words)

	saros - Search Results - MSN Encarta
		Periodically both the sun and the moon return to the same position relative to one of the nodes, with the result that eclipses recur at regular...
		- solar and lunar eclipse cycle: the cycle of 6,585.32 days, or approximately 18 years 11 days, after which a sequence of eclipses of the Sun and Moon repeats itself.
		The Saros cycle is an eclipse cycle with a period of about 18 years 11 days 8 hours (approximately 6585⅓ days) that can be used to predict eclipses of the Sun and Moon
	encarta.msn.com /saros.html (155 words)

	The Saros Cycle
		This, however, represents but one of many eclipse cycles; and almost always, when one speaks of an eclipse cycle, it's in reference to the Saros.
		Yet, tales abound about the philosopher Thales using the Saros to predict the solar eclipse of 585 B.C. Saros cycles don't last forever or indefinitely, because realignments of full Moon with its node are not perfect.
		If the Saros Series has the Moon at the descending node (moving north to south), which #121 does, the first eclipse starts as penumbral at the northern limb of the lunar disk, and the last eclipse of the series ends as penumbral at the Moon's southern limb.
	www.idialstars.com /sar.htm (604 words)

	The Saros Eclipse Cycle
		This 223-lunar month eclipse cycle equals 6,585.321 days, or 18 years and 11.321 days (the figure sometimes varying by one day, depending on the number of intervening leap years).
		A Saros cycle springs into being when the Moon's node comes to within 18 degrees or so west of the full Moon.
		If after one Saros eclipse cycle of 18.031 years, the node moves about one half degree east in relation to the full Moon, then a Saros series must have roughly 72 eclipses in a series (36 degrees divided by 1/2 degree = 72).
	www.idialstars.com /osec.htm (675 words)

	Eclipse History
		As you might expect, there are many (in fact, 42) Saros cycles progressing at the same time and we do not have to wait 18.3 years from one eclipse to the next, we only have to wait 18.3 years for the next eclipse in each Saros cycle.
		However, since the Saros cycle does not include an integral number of days (18 years 11 and 1/3 days, rather than 18 years 11 days exactly), the next eclipse in the cycle will occur one third of the way around the world from the previous eclipse in the cycle.
		So, the Saros cycle allowed ancient astronomers to predict when a solar eclipse could be expected, but it did not help them figure out where the eclipse would occur.
	ds9.ssl.berkeley.edu /solarweek/THURSDAY/history.html (1096 words)

	Noel Tyl - Analytical Techniques
		Saros cycles with their long-term life can seem more significant in mundane than in personal astrology, but in both, there does seem to be a much more significant impact when:
		Another Saros series-eclipse significant to the USA horoscope is SS3 North (October 10, 991 (OS), 2:11:40pm GMT, North Pole) which was the original “parent” of the eclipse which occurred on June 21 2001, prior to the WTC Attack.
		Personal astrology and the Metonic cycle: Saros cycles should not be confused with Metonic cycles, in which solar and lunar eclipses repeat the same degree in a sign every 19+ years through a series of three or (maximum) four eclipses, synchronizing closely with the Nodal Axis cycle mid-series.
	www.noeltyl.com /techniques/030630.html (1650 words)

	Body
		Each long term Saros cycle has its own long term message, a fractal of which is released and 'absorbed' at each eclipse in the series.
		The nature and meaning of each message, of each Saros Cycle, might be found in the astrological examination of the moment of maximum eclipse, at the time of, the first (and last) eclipse in each series.
		After several centuries the Saros cycle 'goes partial', later on in the series it' goes annular', later on it 'goes total'.
	www.users.globalnet.co.uk /~harwood/eclipse.htm (675 words)

	Eclipse frequency and recurrance: The Saros cycles
		Because the Saros does not contain an integral number of days, its biggest drawback is that subsequent eclipses are visible from different parts of the globe.
		A Saros series doesn't last indefinitely because the various periods are not perfectly commensurate with one another.
		If a Saros series begins near the ascending node, the first eclipse will be partial from the northern polar region and the previous sequence of events is reversed.
	www.strickling.net /saros.htm (1375 words)

	Eclipse Encounter
		This is the 65th eclipse of the Saros series 119, an old series which produced its last central eclipse (annular) on 18 March 1950.
		The Saros arises from a harmony between three of the Moon's orbital periods; the Synodic Month (new moon to new moon), the Draconic Month (node to node) and the Anomalistic Month.
		But because the Saros period is not equal to a whole number of days, subsequent eclipses are visible from different parts of the earth.
	www.lowdown.co.zm /2004/2004-04/eclipse.htm (890 words)

	Calculating eclipses
		This time, however, the next eclipse in the 54 year cycle would be some distance further north or further south of the previous track, depending on whether or not the eclipses happen on the descending node (Moon going south as it crosses the ecliptic) or ascending node.
		So this particular Saros is moving steadily southward with each total solar eclipse; note that the 1945 eclipse was 54 years, one month, 2 days before the 1999 eclipse, at similar longitudes, but about 12-15 degrees further north.
		These Saros cycles have one other wonderful surprise: the Moon returns to the same part of its orbit (e.g., perigee or apogee, nearest or furthest distance from Earth) each anomalistic (or orbital) month.
	www.ulo.ucl.ac.uk /public/eclipse/ecl_calc.html (977 words)

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