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I wish to point out errors regarding this portion:
> You will have noticed that there are 3 different cycles of the moon:
> 1. Full moon to full moon in 29.3 days.
> 2. The north and south cycle every 27.5 days.
> 3. The north/south swings over a cycle of 18.6 years.
These vary over long time periods. During the Neolithic:
dm 29.5306023 days per moon
dl 27.32167487 days per lunar orbit
dn 27.21222574 days per lunar nodal period
da 27.55461507 days per lunar anomalistic period
ys 18.61165626 years per lunar standstill period
Days and years are variable and are not fundamental motions, they are products of other motions in combination. Astronomers understanding the cosmos would likely use other temporal benchmarks.
For more on the fundamental astronomy and for links to applets to provide constants (orbits and rotation) and their periodic products (moons, days, years) for different epochs, see:
Eclipses, Cosmic Clockwork of the Ancients
jqjacobs.net/astro/eclipse.html
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