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:
“Out, out, brief candle!
Life’s but a walking shadow, a poor player
That struts and frets his hour upon the stage
And then is heard no more. It is a tale
Told by an idiot, full of sound and fury,
Signifying nothing.”
—William Shakespeare (1564–1616)
“The moon shines bright. In such a night as this,
When the sweet wind did gently kiss the trees,
And they did make no noise, in such a night
Troilus methinks mounted the Troyan walls,
And sighed his soul toward the Grecian tents,
Where Cressid lay that night.”
—William Shakespeare (1564–1616)
“The lifelong process of caregiving, is the ultimate link between caregivers of all ages. You and I are not just in a phase we will outgrow. This is life—birth, death, and everything in between.... The care continuum is the cycle of life turning full circle in each of our lives. And what we learn when we spoon-feed our babies will echo in our ears as we feed our parents. The point is not to be done. The point is to be ready to do again.”
—Paula C. Lowe (20th century)
“The first sparrow of spring! The year beginning with younger hope than ever!... What at such a time are histories, chronologies, traditions, and all written revelations? The brooks sing carols and glees to the spring.”
—Henry David Thoreau (1817–1862)