Mrs. F. Dear,
did you ever wondered why so many people are fascinated by the moon, which in fact has much less an impact on our physical life than the sun? Is it only its position close to the earth and the notion that the movement of the moon is completely depending on the existence of earth? Since unlike the sun, which is like a superpower that nurishes us with its energy but in fact could easily exist without the Earth, the moon is more like the Earth little sibling. Assuming the Earth would suddenly disappear, the moon would leave its orbit and escape into the endless space with a velocity of about 8800 km/h. The sun, however would not even recognise that the earth has disappeared.
It is perhaps this fascination that a large object as far as 380 thousand km away is still completely dependend on us that makes us feeling a some sort of almost intime relationship with the Moon.
Some people believe that the moon phases have a direct and immediate influence onto living organisms on Earth. But appart from the obvious change in night darkness between new and full moon, and the corresponding impact on sleep or nocturnal activity of creatures and people, there is very little solid scientific proof that human health or plant physiology changes with the moon cycle.
But it is not only myself who is amazed ones every month when the full moon rises above the horizon. Have a look at this short video sequence some astronomer did in New Zealand during January full moon. It is a real-time video shot at night with people observing the rising full moon (source: NASA Astronomers Picture of the Day).
It is most likely that the idea of the moon interfering with human physiology and health has its origin in the coincidental similarity of the period of femal oestrus cycle with the duration of the lunar cycle. But despite the apparent similarity between the 29.5 days lunar cycle period (or 27.3 days rotation period around the Earth) and the average 28.5 days of the femal oestrus cycle, there is no synchronity between these two oscillations.
But there was one observation that – for a short moment – made me wonder: Almost with the same frequency that I send to you images of the full moon every 28 days, you send back answers. It did not matter whether I send you just one or twenty e-mails per month: You always answered one per month, and this in very fixed intervalls. Therefore I was almost wondering if it is not so much your free will to write me occasionally, but more the result of a regular hormonal up and down that prompts you to reply to my letters.