Geometric Astrology

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About Course

This is a deep dive into aspects and other principles of geometric astrology. The aim here is to develop the ability to think in purely geometric terms when looking at charts.

Why is this a good idea? Because there are more questions than answers when it comes to house systems and zodiacs. This doesn’t mean that houses and zodiac signs are not valid and legitimate parts of the astrological language, but it’s amazing just how much you can get done without them. In fact, when you get into the really juicy parts of astrology, such as transits, progressions, locational astrology and synastry, you find that aspects are invariably doing most of the heavy lifting!

In this short but intensive course we’ll start with the basics principles involved in calculating and interpreting aspects in the birth chart (and even here there are subtle nuances that even intermediate level astrology students miss), but we’ll go much further than that before the end of the course. We’ll get into life-cycles, Midpoints, minor aspects, as well as special dials and graphs (the Graphic Ephemeris) that help us to filter and manage large amounts of data to identify important factors. We’ll look into the importance of astrological geometry in the realm relationship astrology (synastry), and more.

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Course Content

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  • Welcome & How This Course Works

Session 1 – 8 November 2026 17:00-19:00 GMT (London Time)
Overview of the role of aspects in astrology. Using the Sidereus calculation tools to apply aspects. The lesser used aspects (how to train your eye to spot 45 degree multiple aspects). How to use aspects effectively in interpretation (aspect orbs, house correspondences of 30 degree multiple aspects) Declination and how it's used in astrology. The Sidereus Ephemeris Generator

Session 2 – 15 November 2026 17:00-19:00 GMT (London Time)
The Graphic Ephemeris (how to use the Sidereus Graphic Ephemeris tool, selecting the right period length and modulus for your purpose, declination in the Graphic Ephemeris) Introduction to Midpoints (how midpoints are calculated, presented and interpreted; using the 90 degree dial, life cycles and Midpoints).

Session 3 – 22 November 2026 17:00-19:00 GMT (London Time)
Aspects and Midpoints in Synastry (the cornerstone method in synastry, composite charts and how to use them). Geometric Astrology and Astro-Locality Techniques (how to use the Sidereus locality tools, In Mundo and In Zodiaco aspects in astrocartography). Special Tools & Techniques (the logarithmic time scale by A.T. Mann).