Posts by Alexey Borealis Page 7/8


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Mundane Position in the Placidus System
Mundane Position in the Placidus System

Advanced Primary Direction Calculation

What does the spatial connection of two planets look like in the Placidus house system? Get acquainted with the equations of mundane positions.

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House Cusps in Placidus System
House Cusps in Placidus System

Advanced House Systems

The cusps of houses in the Placidus system cannot be calculated analytically. Moreover, numerical methods do not work at extreme latitudes either.

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Equatian of the Ecliptic
Equatian of the Ecliptic

Advanced Spherical Geometry

In calculating primary directions, it is necessary to know how the right ascension and declination of any degree of any zodiac sign are related.

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Equation for ASC & MC
Equation for ASC & MC

Advanced Spherical Geometry

The basis of any horoscope is the Ascendant and Midheaven degrees. In this article, we will derive the formulas for calculating these degrees.

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What are the Sidereal Time and RAMC?
What are the Sidereal Time and RAMC?

Advanced Spherical Geometry

We use the so-called sidereal time expressed in degrees when calculating primary directions. What are sidereal time and its connection with degrees?

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Ascension Difference Equation
Ascension Difference Equation

Advanced Spherical Geometry

An essential concept in primary directions is the ascension difference. Learn how to calculate this value. This article is for prof. astrologers.

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How to Convert Ecliptical coordinates to Equatorial And Vice Versa?
How to Convert Ecliptical coordinates to Equatorial And Vice Versa?

Advanced Spherical Geometry

Astrologers must convert zodiacal coordinates to ecliptic coordinates and vice versa when calculating primary directions. Let's derive these formulas.

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Spherical Triangles Equations
Spherical Triangles Equations

Advanced Spherical Geometry

Spherical triangle equations are the foundation of mathematical work for an astrologer-forecaster. We will derive these functional equations here.

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rotation matrices
How to Convert one Set of Spherical Coordinates to Another?

Advanced Spherical Geometry

These equations express the coordinates of the planet in various spherical coordinates and provide a basis for calculating primary directions.

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Trigonometry for astrologers
Fundamentals of Trigonometry for Practicing Astrologers

Advanced Spherical Geometry

These basic formulas are needed to understand the subsequent calculations of the primary directorates. Read it if you use this method.

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