M&D - Chapter 19 - Easter, Dionysius, Cherrycoke, Bradley, &...

[David Ewers]

> 
> I know this ain't horseshoes, but 18.61 seems pretty close to 19 to me.  I'm assuming there is a physical correlation (please correct me if I'm wrong)?  
> 


This cycle seems to be a coincidence. The periods of the Moon's orbit around the Earth and the Earth's orbit around the Sun are believed to be independent, and do not have any known physical resonance. An example of a non-coincidental cycle is the orbit of Mercury, with its 3:2 spin-orbit resonance.

http://en.wikipedia.org/wiki/Metonic_cycle

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