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Primary Direction Calculation Alexey Borealis

Planets conjunct each other spatially when their mundane positions coincide. What is it, and how can it be calculated? Learn more from this article.

Primary Direction Calculation Alexey Borealis

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

House Systems Alexey Borealis

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

Spherical Geometry Alexey Borealis

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

Spherical Geometry Alexey Borealis

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

Spherical Geometry Alexey Borealis

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

Spherical Geometry Alexey Borealis

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

Spherical Geometry Alexey Borealis

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

Spherical Geometry Alexey Borealis

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

Spherical Geometry Alexey Borealis

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