Full Moon Cycle and The Year
Formulated in another way: the full moon cycle is the period that it takes the Sun to return to the perigee of the Moon's orbit (as seen from the Earth). So it is a kind of "perigee year", similar to the eclipse year which is the time for the Sun to return to the ascending node of the Moon's orbit on the ecliptic.
Why does a full moon cycle last almost 14 lunations rather than just the 12.37 lunations of a year? This would be the case, if the moon's orbit kept a constant orientation with respect to the stars, but the tidal effect of the Sun causes the orbit to precess over a cycle just under 9 years. In that time, the number of full moon cycles passed becomes one less than the number of sidereal years passed.
Hence the full moon cycle can be defined such that the lunar precession cycle is the beat period of the full moon cycle and sidereal year. See lunar precession.
Read more about this topic: Full Moon Cycle
Famous quotes containing the words full, moon, cycle and/or year:
“One can’t truly feel for the starving with a full stomach.”
—Chinese proverb.
“Though it seems improbable on the face of it
You must master the huge retards and have faith in the slow
Blossoming of haystacks, stairways, walls of convolvulus,
Until the moon can do no more. Exhausted,
You get out of bed. Your project is completed
Though the experiment is a mess.”
—John Ashbery (b. 1927)
“Only mediocrities progress. An artist revolves in a cycle of masterpieces, the first of which is no less perfect than the last.”
—Oscar Wilde (1854–1900)
“A year at the breast is quite enough; children who are suckled longer are said to grow stupid, and I am all for popular sayings.”
—Honoré De Balzac (1799–1850)