How the Hidden Zodiac works
°
Exact degree
Every placement is read to the arc-second — degree, minute, and second — never rounded away.
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The Duad
Each 30° sign splits into 12 × 2°30′ Duads that modify the visible expression of the sign.
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The Compendium
Each Duad splits again into 12 × 0°12′30″ Compendiums — the deeper internal mechanism.
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Activated houses
The Duad and Compendium signs activate the Whole-Sign houses they occupy in your chart.
The Duad and Compendium never replace your natal sign or house — they are deeper layers operating through the primary placement. Align uses Whole-Sign houses and its own rulership system throughout (Vesta rules Virgo, Juno rules Libra, Pluto Scorpio, Uranus Aquarius, Neptune Pisces).