Progressions
A symbolic technique for advancing a chart over time.
Overview
Progressions advance a birth chart according to a symbolic rule rather than by tracking actual planetary motion. The best-known form equates one day after birth with one year of life — an explicitly symbolic correspondence, not an astronomical one.
- Secondary progressions use a day-for-a-year rule that is symbolic by construction.
- Unlike transits, progressed positions do not correspond to where the planets actually are.
- The progressed Moon completes a cycle in roughly 27–28 years.
- Solar arc directions advance everything by the Sun's progressed motion.
The day-for-a-year rule
Secondary progression takes the positions of the planets on the nth day after birth as representing the nth year of life. A chart for someone aged thirty uses the sky as it was thirty days after their birth.
The tradition is explicit that this is a symbolic correspondence rather than a physical one. Nothing in astronomy connects the sky one month after a birth to a person's thirtieth year; the rule is a convention within the interpretive system, and practitioners generally describe it that way.
What moves, and how fast
- The progressed Sun advances about one degree per year, so it changes sign roughly every thirty years — a shift traditionally read as a significant reorientation.
- The progressed Moon advances about one degree per month, completing a full zodiac circuit in roughly 27 to 28 years, and its cycle is the most-used progression in practice.
- Mercury, Venus and Mars progress slowly and may change sign only once or twice in a lifetime.
- The outer planets barely move under progression at all, so progressed aspects involving them are rare and treated as notable when they occur.
Solar arc and other methods
Solar arc direction advances every point in the chart by the same amount the progressed Sun has moved — roughly a degree per year. This keeps the chart's internal geometry intact while shifting it as a whole against the natal positions, producing a different set of contacts from secondary progressions.
Other directional methods exist, including primary directions, which are computationally intricate and were central to earlier traditional practice. Which technique a practitioner uses is a matter of school and preference; there is no agreed hierarchy among them.
Progressions versus transits
The two techniques are used differently within the tradition. Transits use actual current planetary positions and are read as external circumstances or events; progressions use symbolically advanced positions and are read as internal development.
The distinction matters for understanding what is being claimed. A transit at least refers to a real configuration of the sky at the moment in question. A progression refers to a configuration that occurred decades earlier and is being mapped onto the present by rule.
Continue in the data
Catalogues, hubs, and reference pages that hold the underlying records for this topic.
Frequently asked
- What are secondary progressions?
- A technique that equates one day after birth with one year of life, so the chart for someone's thirtieth year uses the sky thirty days after their birth. Astrological tradition treats it as an explicitly symbolic correspondence rather than a physical relationship, and practitioners generally describe it that way.
- How is a progression different from a transit?
- A transit uses the actual current position of a planet compared against the natal chart. A progression uses positions advanced by a symbolic rule — typically a day for a year — so the progressed chart does not correspond to where the planets are now. Tradition reads transits as external circumstance and progressions as internal development.
- What is the progressed Moon cycle?
- Under a day-for-a-year rule, the Moon's roughly 27.3-day orbital period becomes a cycle of about 27 to 28 years, so the progressed Moon passes through each sign for roughly two and a quarter years. It is the fastest-moving progressed factor and is consequently the most used in practice for describing shorter-term development.