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Spherical Geometry

Practical notes, formulas and real-chart analyses from Alexey Borealis on Spherical Geometry — predictive astrology without the jargon.

What are the correlations between right ascension, declination, and celestial latitude for any point on the ecliptic?

Suppose you know the sidereal time and local coordinates. What is the ascending degree? The math formula for ASC.

A simple way to calculate ascension difference with use of spherical triangle equation. Astrological knowledge base

What math equations are needed to express zodiacal longitude and latitude to the right ascension and declination?

In this article, we derive math equations for spherical triangles, including the well-known theorem of sinuses.

How to convert one spherical coordinate system to another? What are the rotation matrices, and how to use them?

What do sine and cosine mean, where do they come from, and how are coordinates of the celestial point relate to them