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At that time I studied the program and had an email exchange with the author. It would be difficult to go into details, which I do not remember exactly, but as far as I have verified the primary directions of the PDE are not the traditional ones.

Roberto

I has been too hasty to comment on ZET's three-dimensional graphs when they are used in Placidus house system. The problem that arises with Placidus derives from the fact that each planet has its own diurnal arc with celestial latitude other than zero (the orbits do not lie on the ecliptic) and that...

Hi Harold, As for the link you reported, as I understood from the example shown, ZET also correctly depicts the three-dimensional representation of the Placidean domification. That is, it is not based on the in mundo path of the Sun and then projecting onto this (somehow) the position of the planets...

Hi Harold, I apologize for my absence, but the Skyscript forum has some imperfections... In addition to changing the content of the texts if some mathematical notation is used, most of the time I do not receive notifications of reply messages on the threads I participate in. So I had not noticed you...

Hi Harold, Attention: ZD is not a point. As already explained, it is the arc measured on the Prime Vertical (a great circle) starting from the Zenith or the Nadir, whichever is the smallest, up to the point where the Circle of Houses passing through the position of the planet intersects. When you as...

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