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When is the moon full?

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18.10.2019

If you have never watched the full moon rising above the hills on the other side of a lake, you really need to do something about that.

It is beautiful and special. An added mystique comes from knowing we are doing something even our remotest ancestors must have done.

This may be one of the reasons the phases of the moon are listed in most of our diaries and calendars. However, if so why are the dates of the lunar phases sometimes wrong, usually out by a day?

Our ancestors must have taken note of the phases of the moon, although they did not know what was going on. They reckoned the passage of time using the moon. That is where the word "month" came from.

Today, we do understand what causes the lunar phases. They arise from the direction we are looking at the moon compared with the direction of the sunlight illuminating it. We can only see the moon because of the sun lighting it up.

In fact, unless........

© Castanet