Harmonic Lab

The natal wheel only shows aspects built on halves and thirds of the circle. Harmonic charts retune it: multiply every position by N and the fifth-, seventh-, and ninth-part relationships snap into view as conjunctions. John Addey called this the harmonic anatomy of the chart; Vedic astrology has used the ninth (navamsa) for centuries.

Load a chart, pick a harmonic, and see which planets fuse into conjunctions in that harmonic: aspects the natal wheel keeps hidden.

How to use the Harmonic Lab

›What a harmonic chart is

Multiply every natal position by N and reduce mod 360, and planets that were a 360/N fraction of the circle apart become conjunctions. Each harmonic makes one family of aspects visible: H5 reveals quintiles (creative obsession), H7 septiles (the inspired and fated), H9 noviles (and the Vedic navamsa).

›What to look for

Tight conjunctions and clusters in the harmonic chart are the finding: they mark planet combinations woven together in that harmonic's register even though the natal chart shows no aspect between them. The natal positions have not changed, you are looking at the same chart through a different lens.

›Age harmonics

Setting N to your current age (plus one for the running year, by some schools) profiles the year's themes. It is a speculative technique: treat it as a journaling prompt, not a forecast.