Reinhold Ebertin (1901–1988) was a German astrologer, author, and researcher who pioneered Cosmobiology. He was heavily influenced by the work of Alfred Witte, the founder of the Hamburg School of Astrology and Uranian Astrology. However, Ebertin chose to reject some of Witte’s more controversial premises—specifically the use of hypothetical trans-Neptunian planets.
| Feature | The Combination of Stellar Influences (Ebertin) | Rulebook of Planetary Pictures (Witte) | | :--- | :--- | :--- | | | Reinhold Ebertin (Cosmobiology) | Alfred Witte (Hamburg School) | | Primary Language | German (Orig.), English (Translated) | German | | Core Concept | Midpoints and Planetary Pictures | Midpoints and Planetary Pictures | | Use of Hypothetical Planets | No. Removed to simplify and focus | Yes. Uses Trans-Neptunian points | | Key Innovations | Added psychological & medical correlations. Simplified technique. | First comprehensive system of planetary pictures. | | Primary Focus | Psychological, biological, and sociological meaning. | Prediction and event-oriented analysis. | | Publishing Status | Active, widely available in English. | Out-of-print, historical importance. |
The 90-degree method is exceptional for timing events in transit and progression studies.
It provides concrete language for understanding how planetary energies manifest as actions and tendencies, helping astrologers provide clearer guidance. | Feature | The Combination of Stellar Influences
A specialized tool designed to make finding hard aspects and midpoints visually instantaneous.
: A central tool of Cosmobiology, the 90-degree dial simplifies complex charts by condensing them based on planetary modalities (cardinal, fixed, and mutable), effectively treating all hard aspects as conjunctions for easier analysis. Midpoint Theory
or violate intellectual property laws, consider these options: Scribd or Academia.edu Simplified technique
The defining feature of Ebertin’s system is the extensive use of midpoints. A midpoint is the exact mathematical center between two planets or sensitive points in a chart. For example, if your Sun is at 0° Aries and your Moon is at 30° Aries, your Sun/Moon midpoint ( ) sits at 15° Aries.
How the energy expresses itself in human behavior, personality, and mental states.
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The modern English edition is published by the American Federation of Astrologers, a 340-page volume that remains in print.
The Combination of Stellar Influences acts as an encyclopedic dictionary for planetary blends. If you are looking at a specific midpoint structure in a birth chart or during a transit, COSI provides a clear, tripartite breakdown for every single planetary combination:
Demystifying "The Combination of Stellar Influences" by Reinhold Ebertin: A Complete Guide to Cosmobiology
Unlike traditional astrology, Cosmobiology strips away complex house systems and zodiacal signs. Instead, it focuses heavily on hard aspects, midpoints, and empirical observation. Core Concepts in "The Combination of Stellar Influences"
Yes – Astro.com has a free “Midpoint Ephemeris” that uses Ebertin’s interpretations with permission. Not downloadable, but free to browse.