Secondary progressions
Secondary progressions are a symbolic technique in which each day after birth is equivalent to a year of life: the chart of your thirtieth day describes your thirtieth year.
It is a symbolic technique, not an astronomical one: it does not describe where the planets are now, but where they were in the days following your birth, read as if they were years.
The day-for-a-year equivalence already appears in Ptolemy and was formalized in medieval and modern astrology. It coexists with transits without competing: transits are the real sky of today, progressions are an internal development.
What it reveals
Slow maturation: how your chart changes from the inside. Not external events—transits bring those—but the process itself.
The progressed Ascendant is the most used piece: it advances roughly one degree per year and changes sign about every three decades. That change marks fairly recognizable turns of life stage.
The progressed Moon is the fine needle: it completes the circuit in some 28 years and spends a little over two years per sign, marking the emotional climate of each stretch.
Progressions and transits
They are read together and they answer different questions. A transit says what is happening outside; a progression says at what internal moment it catches you.
When the two coincide—an important transit over a point that is also being activated by progression—the tradition reads an especially marked period.
Frequently asked questions
What are secondary progressions?
They are a symbolic technique in which each day after birth is equivalent to a year of life. The chart of the thirtieth day after birth describes the thirtieth year, and it is read as internal development rather than as external events.
What is the difference between progressions and transits?
Transits are the real sky of today touching your natal chart: they describe what happens outside. Progressions are symbolic and describe internal maturation. They are read together and they complement each other.
What is the progressed ascendant?
It is the Ascendant of the progressed chart, which advances close to one degree per year. Its change of sign, which happens roughly every three decades, tends to coincide with turns of life stage.