slingbadger
Interfector Viris Spurii
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Don't Badger a Badger
Posts: 3220
Akron NY
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There is a couple of different ways of doing it, depending on if you mean days or hours. The moon cycles every 28 1/4 days. As it does, it goes through phases. These phases occur at a predictable rate. So, using either the full or new moon as a base, you can tell the number of days that have gone by since the base. If you know the calender day that your base is on, you can then tell what day of the week it is. Now, for hours. First, you need to establish a North-South line. ( meridian). Then, wait for the moon to pass by the meridian, or in other words, be directly South. Now, the full moon passes directly South at midnight. It is possible, using a mathematical formula, to use the other phases passing the meridian to find out the time, but it isn't something that can really be carried in our heads. There is a chart-graph available. Look up the phase the moon is in, and it will tell you how many minutes/hours before or after midnight that phase passes the meridian. Make sense? This was common knowledge to navigators and astronomers even into the late 1800's.
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