Progression

Progressions are symbolic chart movements that advance the natal chart slowly over the course of a life, providing a long-arc developmental timing layer separate from transits.

Where transits track the actual current positions of planets in the sky, progressions advance the natal chart symbolically. The most common form, secondary progressions, uses the formula 'one day equals one year': the chart cast for one day after birth represents the person at age 1, two days after birth represents age 2, and so on. Solar arc progression advances every point in the chart by roughly one degree per year of life, keeping all the relationships the same but slowly moving the entire chart forward. The progressed Sun moves about one degree per year, changing signs roughly every thirty years. A progressed-Sun sign change is often read as marking a significant chapter shift in identity or life-orientation. The progressed Moon moves much faster, changing signs roughly every two and a half years and completing a full zodiac cycle every twenty-seven to twenty-eight years — its cycle is often used to track the rhythm of emotional and developmental chapters. Progressed aspects (a progressed planet forming an aspect to a natal planet, or two progressed planets aspecting each other) are read as describing slowly-unfolding developmental themes. Unlike transits, which can be intense for days or weeks, progressed aspects are often in effect for months or years and describe the slow background developmental work of a period rather than its acute events. In this reading, progressions are not surfaced directly, but they form part of the underlying astrological framework. They are most useful as a long-arc developmental lens — what chapter of life one is in — rather than as predictors of specific events.

Not: Progressions are not predictions. The 'day for a year' formula is symbolic, not causal. Progressions describe slow developmental themes that may or may not surface as specific events. They are most useful as a reflective framework for understanding long-arc life chapters, not as a forecasting tool.

Progression techniques have no empirical validation. The 'day for a year' formula is a traditional convention, not a demonstrated correspondence. Progressions are useful as one interpretive layer among several, not as standalone evidence about what is happening or will happen in a life.