Astrology Arith(m)etic

The Building Blocks of Astrology

Home / Interpretation / Progression Charts Overview

Progression Charts Overview

Interpretation/Charts/Progression/overview.md

interpretation · progression · charts

Progression Charts Overview

Progressions track the symbolic unfolding of the natal chart. Study progressed Moon aspects to gauge emotional growth.

🧭 Construction & Method

Secondary progressions use the symbolic key one day after birth = one year of life (day-for-a-year). For age n years, compute the chart for JD_birth + n × (1 day) (more precisely n × 365.2422 / 365.2422 days → 1 ephemeris day per tropical year). Typical rates: progressed Sun ≈ 0°59′/yr; progressed Moon ≈ 11°–15°/yr (≈ 1° per month), completing a full circuit in ≈ 27.3 years and a full progressed lunation cycle in ≈ 29.5 years. Solar-arc directions add the progressed Sun’s arc to every natal point; Naibod arcs use the mean rate 0°59′08″ per year.

Key factors

📐 Arith(m)etic Worksheet

Following the book’s method — “pull three datasets from the catalog” (body, aspect, body) and combine them with sign and house — record each contact as:

a (body 1) 1 (sign of a) house of a aspect (operator) b (body 2) 2 (sign of b) house of b orb applying/separating
… … … … … … … … …

Then read: (a + 1)^house(a) × (b + 2)^house(b) = interpretation — i.e., body-in-sign, coloured by house, joined by the aspect’s quality. In Progression work the bodies come from the moving chart (progressed/transiting) and the natal chart.

Approaches

Sources (method)