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

Advanced Time in Astrology Alexey Borealis

Did you know astrology uses atomic time, cosmic clocks, and Earth’s rotation? Read how to use them for predictions

Advanced Time in Astrology Alexey Borealis

Learn how UT, UTC, TT, and sidereal time influence astrological calculations. A simple explanation of complex concepts.

Advanced Primary Direction Calculation Alexey Borealis

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

Advanced 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.

Advanced 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.

Advanced 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.

Advanced 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.

Advanced Time in Astrology 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?

Advanced 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.

Advanced Spherical Geometry Alexey Borealis

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