Category "Mathematics of the Celestial Sphere" Page 1/2



Primary Direction in Placidus System
Primary Direction in Placidus System

Primary Direction Calculation Alexey Borealis

A complete guide for astrologers: calculating a primary direction in the Placidus house system with mathematical formulas.

Read more →
Formulas for primary direction in the Regiomontanus system
Primary Direction in Regiomontanus System

Primary Direction Calculation Alexey Borealis

A complete guide for astrologers on how to calculate a primary direction in the Regiomontanus house system with math formulas.

Read more →
Mundane Antiscia Equation
Mundane Antiscia Equation

Primary Direction Calculation Alexey Borealis

Antiscia is a point symmetrical to the planet's degree. But if the planet deviates from the ecliptic, it has two antisсia. Let's illustrate it.

Read more →
A Circle of Mundane Aspects
A Circle of Mundane Aspects

Primary Direction Calculation Alexey Borealis

The main question in primary directions is which plane to use for aspects. It is not the equator or the ecliptic. Let's explore the right approach.

Read more →
Mundane Position in the Regiomontanus System
Mundane Position in the Regiomontanus System

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.

Read more →
Mundane Position in the Placidus System
Mundane Position in the Placidus System

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.

Read more →
House Cusps in Placidus System
House Cusps in Placidus System

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.

Read more →
Equatian of the Ecliptic
Equatian of the Ecliptic

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.

Read more →
Equation for ASC & MC
Equation for ASC & MC

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.

Read more →
What are the Sidereal Time and RAMC?
What are the Sidereal Time and RAMC?

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?

Read more →