babylon

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I examined the system of ascensions of the Zodiacal signs used by Hellenistic astrologers. You can find it in the previous post of this line. This time we consider Hellenistic method of primary directions. Let’s consider an example of calculation of primary directions from the text of Paulus Alexandrinus.

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I wrote two posts on story of primary directions. It was couple years ago, and now these posts are buried deeply in the archives of Angelicus Merlin Group. Therefore I decided to repeat that stuff and perhaps to develop the subject.

First of all, because primary directions are based on daily rotation of celestial sphere, we must have a mathematical model of this rotation to calculate directions. The first model of this rotation was made in Babylon, but astrologers of Hellenistic period mostly call it “according to Egyptians”.

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