
Review of Short Phrases and Links 
This Review contains major "Metonic Cycle" related terms, short phrases and links grouped together in the form of Encyclopedia article.
Definitions
 Metonic Cycle is a cycle that produces the same phase of the moon on the same date of the tropical year every 19 years.
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 The Metonic cycle is 235 lunations or nineteen years, after which period the sun and moon occupy the same position relative to the stars.
 The Metonic cycle was improved by both Callippus and Hipparchus.
 Year 19 (there is no year 0) of the Metonic cycle is a year exactly divisible by 19 (ie when the Jewish year number, when divided by 19, has no remainder).
 In Antiquity the Metonic cycle was sometimes called the Great year.
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 It is based on the Metonic Cycle of 19 years, a "solar cycle" of 28 years, and the Indiction Cycle of 15 years.
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 The leap years are years 3, 6, 8, 11, 14, 17, and 19 of the Metonic cycle.
 The Lunar Equation is an expression of the difference between the Julian calendar and the Metonic cycle.
 If the remainder is zero, the year is also a leap year since year 19 of the Metonic cycle is a year exactly divisible by 19.
 In the same manner, the remainder of the division indicates the year in the Metonic cycle (years 1 to 18) the year is in.
 The synodic month is used in the Metonic cycle.
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 More scientifically, 19 is the number of years in the Metonic cycle, after which all the phases of the moon recur on the same day of the month.
 Metonic cycle: see synodic period.
Metonic Cycle
 The Metonic cycle in astronomy and calendar studies is an approximate common multiple of the orbital periods of the Earth and the Moon.
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 Nineteen years is preferred because the relative positions of the earth, moon and sun repeat almost exactly in the Metonic cycle of 18.6 years.
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Categories
 Synodic Period
 Orbital Periods
 Synodic Month
 Lunar Months
 Leap Year

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