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# Topic: Metonic cycle

###### In the News (Thu 15 Nov 18)

 Metonic cycle - Facts, Information, and Encyclopedia Reference article The Metonic cycle or Enneadecaeteris in astronomy and calendar studies is a particular approximate common multiple of the tropical year and the synodic month. Meton approximated the cycle to a whole number (6940) of days, obtained by 125 long months of 30 days and 110 short months of 29 days. The Callippic cycle was a more accurate approximation, obtained by taking one day away from every fourth of Meton's cycles, so creating a 76-year cycle with a mean year of exactly 365.25 days. www.startsurfing.com /encyclopedia/m/e/t/Metonic_cycle.html   (359 words)

 cycle@Everything2.com In combinatoric graph theory a cycle is a subset of the edge-set of a graph that forms a chain, the first node of which is also the last. Cycle of the moon, or Metonic cycle, a period of 19 years, after the lapse of which the new and full moon returns to the same day of the year; -- so called from Meton, who first proposed it. Cycle of the sun, Solar cycle, a period of 28 years, at the end of which time the days of the month return to the same days of the week. www.everything2.com /index.pl?node=cycle   (909 words)

 The Dispatch - Serving the Lexington, NC - News This cycle can be used to predict eclipses, forms the basis of the Greek and Hebrew calendars, and is used in the computation of the date of Easter each year. Adding the 11 year cycle to 17 or 18 Metonic cycles creates the more accurate cycles of 334 years in 4131 lunations and 353 years in 4366 lunations (see lunisolar calendar). Meton of Athens approximated the cycle to a whole number (6940) of days, obtained by 125 long months of 30 days and 110 short months of 29 days. www.the-dispatch.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Metonic_cycle   (719 words)

 Epact The whole system of epacts is based on the Metonic Lunar Cycle (otherwise known as the Cycle of Golden Numbers), and serves to indicate the days of the year on which the new moons occur. This cycle in its original form continued to be used until 1582, when it was revised and embodied in the Gregorian calendar. This discovery found such favour among the Athenians that the number assigned to the current year in the Metonic Cycle was henceforth written in golden characters on a pillar in the temple, and, whether owing to this circumstance or to the importance of the discovery itself, was known as the Golden Number of the year. www.catholicity.com /encyclopedia/e/epact.html   (1362 words)

 Metonic cycle - Wikipedia, the free encyclopedia The Metonic cycle or Enneadecaeteris in astronomy and calendar studies is a particular approximate common multiple of the year (specifically, the seasonal i.e. This cycle is used by the Hebrew calendar. Meton approximated the cycle to a whole number (6940) of days, obtained by 125 long months of 30 days and 110 short months of 29 days. en.wikipedia.org /wiki/Metonic_cycle   (551 words)

 Cycle - Wikipedia, the free encyclopedia Citric acid cycle, Kreb's cycle, the Born Haber cycle or the Calvin cycle. The cycle is a unit of phase angle equivalent to one oscillation, or 2π radians. In astrophysics, the CNO cycle is a sequence of nuclear reactions whose net effect is fusion. en.wikipedia.org /wiki/Cycle   (454 words)

 FanFiction.Net : Dictionary & Thesaurus   (Site not responding. Last check: ) Cycle of the moon, or Metonic cycle, a period of 19 years, after the lapse of which the new and full moon returns to the same day of the year; -- so called from Meton, who first proposed it. Cycle of the sun, Solar cycle, a period of 28 years, at the end of which time the days of the month return to the same days of the week. Cycle of indiction, a period of 15 years, employed in Roman and ecclesiastical chronology, not founded on any astronomical period, but having reference to certain judicial acts which took place at stated epochs under the Greek emperors. www.fanfiction.net /dictionary.php?word=Solar+cycle   (1208 words)

 CYCLE - Definition The circle of subjects connected with the exploits of the hero or heroes of some particular period which have served as a popular theme for poetry, as the legend of Arthur and the knights of the Round Table, and that of Charlemagne and his paladins. In the Gregorian calendar the solar cycle is in general interrupted at the end of the century. The number of cycles (per second) is a measure of the frequency of an alternating current. www.hyperdictionary.com /dictionary/cycle   (768 words)

 TMTh:: METON OF ATHENS Meton was the son of Pausanias, and a native of Athens (like Demosthenes, he was from the Deme of Leuconoe, between present-day Stavros and Paiania). Meton is known for the 19-year "Metonic cycle", which he introduced into the ancient Athenian luni-solar calendar as a fixed system for recording astronomical observations. The Metonic cycle is still used to determine the date of Easter, since every 19 years the phases of the moon recur on the same days of the solar year. www.tmth.edu.gr /en/aet/5/69.html   (346 words)

 cycle - definition by dict.die.net Calippic cycle, a period of 76 years, or four Metonic cycles; -- so called from Calippus, who proposed it as an improvement on the Metonic cycle. Cycle of eclipses, a period of about 6,586 days, the time of revolution of the moon's node; -- called Saros by the Chaldeans. The use of the term "cycle" for a computer clock period can probably be traced back to the rotation of a generator generating alternating current though computers generally use a clock signal which is more like a square wave. dict.die.net /cycle   (707 words)

 Glossary The ⇒Metonic cycle was the basis of the lunar calendar of the Julian calendar. A lunisolar calendar based on the Metonic cycle was in use for the ⇒cyclic calculation of the moon to compute the date of ⇒Easter until the Gregorian reform in 1582. The cycle had a length of eight years, of which five were common years and three ⇒leap years with 12 and 13 months respectively. www.ortelius.de /kalender/gloss_en.php   (3350 words)

 Metonic Cycle The Metonic Cycle is a period of about 6939.6 days, the approximate length of both 235 consecutive lunations and 19 solar years. Meton, an Athenian who lived in the middle of the fifth century B.C., is the cycle's namesake. The Metonic cycle was improved by Hipparchus and Callipus of Cyzius (c. www.12x30.net /metonic.html   (419 words)

 INTERNATIONAL INSTITUTE OF ASTROARCHAEOLOGY : SOME MOON RHYTHMS   (Site not responding. Last check: ) His description of the cycle is a bit confusing - “the period in which the return of the stars to the same place in the heavens is accomplished” - that sounds more like the precession of the equinoxes, but there is a return of sorts in the Metonic cycle. As we’ve seen, although the nodal cycle (at 18.6 years) is different from the Metonic cycle (at 19 years), because the major standstills happen when the sun is at an equinox position, not infrequently one extreme moon is a Metonic cycle away from the next. You could use the Metonic cycle (19 years) to predict the next return of the moon to her southernmost position so long as in three out of five cycles on average, you subtracted one year from the cycle length of 19 years, and expected her in 18 years. www.astroarchaeology.org /context/sunmoon   (8500 words)

 Metonic Cycle - LoveToKnow 1911 METONIC CYCLE, in chronology, a period of 19 years during which there are 235 lunations, so called because discovered by Meton. The relation between integral numbers of months and years expressed by Meton's rule therefore deviates only two hours from the truth. Since 19 Julian years make 6939 days, 18 hours, the relation errs by only I. 5 hour when the Julian year is taken. www.1911encyclopedia.org /Metonic_Cycle   (95 words)

 Cycles Research Institute - Astronomy Knowledge of the 19 year eclipse cycle know as the Metonic cycle was actually taken to Greece from Britain according to Sir Fred Hoyle, and from there came down to modern times. Cycles of these periods and half these periods, because tides happen twice per cycle, are all commonly reported cycles. Cycles in time are closely connected to periodicities in space because the wave nature of all forces automatically causes periods to produce spacings and vice versa. www.cyclesresearchinstitute.org /astronomy.html   (1094 words)

 Metonic Cycle - Search Results - MSN Encarta Metonic Cycle - Search Results - MSN Encarta Metonic Cycle, cycle of 19 years composed of 235 lunar months, at the end of which time the full moon appears on the same day in the year as it did... - lunar cycle lasting 19 years: a cycle of 235 lunar months, after which the phases of the Moon occur on the same days of the month as they did at the start of the cycle encarta.msn.com /Metonic_Cycle.html   (151 words)

 Metonic Cycle - Search Results - MSN Encarta Metonic Cycle - Search Results - MSN Encarta The era of the Olympiads of the Greeks was reckoned from July 1, 776 bc, and Greek astronomers introduced the Metonic cycle of 235 lunations (almost... - lunar cycle lasting 19 years: a cycle of 235 lunar months, after which the phases of the Moon occur on the same days of the month as they did at the start of the cycle uk.encarta.msn.com /Metonic_Cycle.html   (152 words)

 synodic period - Encyclopedia.com This period, called the Metonic cycle, was discovered by the Greek astronomer Meton in 433 BC It is used in determining the date of Easter in the Gregorian calendar and was used in placing the intercalary month in the ancient Greek calendar. Cycle in the average period (27.555 days) of the revolution of the Moon around... Cycles and Gann: shaping a trading philosophy: legendary trader W.D. Gann followed a number of astrological cycles that played a key role in how he lived and how he looked at trading. www.encyclopedia.com /doc/1E1-synodicp.html   (1066 words)

 Crucifixion of Jesus Christ The Aristean Cycle is a cycle of 12 Metonic Cycles totalling 235 lunar years and showing in which month of the Jewish civil lunisolar calendar when the first month of the 12-lunar-month Jewish religious year falls. The Aristean Cycle and the twelve kinds of Metonic Cycles beginning on each of the 12 months of the Jewish civil luni-solar calendar. First month of the Jewish religious year in the 235-lunar-year Aristean Cycle and 19-lunisolar-year Metonic Cycle and date when new moon occurs. www.geocities.com /peacecrusader888/aristeancycle.htm   (497 words)

 Ivars Peterson's MathTrek The unfailing, daily passages of the sun across the sky and the corresponding movements of the stars at night represented one highly predictable cycle. The so-called Metonic cycle is still used to determine the Jewish calendar and set the date of Easter. It contained a system of gears whose gear ratios corresponded to well-known astronomical cycles involving the moon, including the Metonic cycle. www.maa.org /mathland/mathtrek_10_13.html   (704 words)

 Chapter 1: PREDICTABLE PERIODIC EVENTS-PART II Simply stated, the SAROS Cycle is the result of a nearly perfect common integral number of synodic, nodical and anomalistic months. Metonic Cycle (235 Synodic months): Moon repeats its phase on nearly the same day of the year but is generally two hours longer than 19 calendar years (leap-years account for the additional day(s)). 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)

 BBC - h2g2 - Metonic cycle./ Metonic cycle: A period of 235 lunar month's or about 19 Julian year's, at the end of which the phase's of the moon recur in the same order and on the same day's as in the preceding cycle. The lunar calendar of the Chinese, supposed to have begun in 2397 B.C. Years are reckoned in cycles of 60, each year having a particular name that is a combination of two characters derived schematically from two series of signs, the celestial and the terrestrial. The lunisolar calendar used by the Hebrew's, reckoning time from the year of creation, 3761 B.C., and based on a metonic cycle of 19 year's, with the 3rd, 6th, 8th, 11th, 14th, 17th, and 19th years of each cycle designated leap years. www.bbc.co.uk /dna/h2g2/A3092302   (796 words)

 The Calculation of Easter In the Frankish empire the cycle of Victorius was adopted during the 5th century. In the first year of the Metonic cycle the epacts was 0, while in the second its value was 11. The error of the Metonic cycle is corrected by increasing the epacts seven times in a 2500-year cycle. www.ortelius.de /kalender/east_en.php   (4091 words)

 Metonic cycle Information The Babylonians may have known it earlier, and originally they may have measured the Moon's motion against the stars (sidereal year); however, ancient astronomers did not make a clear distinction between sidereal and tropical years before Hipparchus discovered precession of the equinox ca. 130 B.C. This cycle is used by the Hebrew calendar. It is possible that Homer knew about the cycle some centuries before Meton, and used it in the Odyssey. www.bookrags.com /Metonic_cycle   (502 words)

 Matrix Astrology Software : Learn Astrology - Astro Index The Metonic cycle has interpretive signficance in terms of eclipses which occur at 19 year intervals in an individual's life, the so-called Metonic Return. Meton used this information to improve the accuracy of the lunar calendar in use at the time. The Greek calendar was in fact based on the Metonic cycle, and remained in common use until 46 BC, when Julius Caesar (with the help of Sosigenes) instituted the Julian calendar. www.astrologysoftware.com /cg/x.dll?p=na2&sql=E3&name=Metonic|Cycle&orig=../../resources/outline/MS_OutEclipse.asp?orig=   (394 words)

 CATHOLIC ENCYCLOPEDIA: Epact Meton's theory, as adopted by the Church until the year 1582, might be briefly expressed as follows: The average Lunar Cycle consists of, We have already seen that the Church used the Metonic Cycle until the year 1582 as the only practical means devised of finding the fourteenth day of the paschal moon. In the course of time it was found that the paschal moon of the Metonic Cycle was losing all relation to the real paschal moon, and in the sixteenth century (c. www.newadvent.org /cathen/05480b.htm   (3223 words)

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