# Category "Spherical Geometry" Page 1/1

Spherical Geometry Mark Rusborn

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

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

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Acquaintance with the primary directions begins with an understanding of the basics of celestial geometry. Learn the basic concepts of 3D astrology.

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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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