Geometry
Exact angle: 90°. Lúmina working orb: 8°.
Interpretive function
Creates friction that can become conflict, urgency or competence through repeated adjustment.
Why the planets matter
The aspect describes the relationship between functions; the planets tell us which functions are negotiating. A Venus–Saturn square is therefore not the same problem as a Mercury–Mars square.
Orb policy
Orb practice varies among astrologers. The numbers above are Lúmina v1 reproducibility standards rather than claims of universal agreement.
Friction can become method
A square repeatedly forces two functions to acknowledge one another. Early expression may alternate between extremes or produce conflict. Mature expression often develops a procedure: when one function acts, the other receives a defined place instead of interrupting unpredictably.
Applying and separating
An applying aspect is moving toward exactness; a separating aspect has already perfected. This distinction can change emphasis and timing, but it does not erase the aspect geometry or the condition of the planets involved.
Natal aspect versus transit
In transit work, a square tends to increase pressure for adjustment. The event itself is not specified by geometry; the natal planets and houses identify the functions and arenas under friction.
Interpretation checklist
- Name both planetary functions.
- Check sign and house condition.
- Measure the actual orb.
- Distinguish natal pattern from temporary transit.
- Confirm the symbolism against observed context.
Three concrete examples
Mercury–Mars can force thought and assertion to negotiate speed; Venus–Saturn can put value and limit in repeated friction; Moon–Uranus can pit familiar regulation against sudden change. Repetition is where a square can become competence.
What not to conclude
An aspect is not an event generator. It describes geometry between functions. A natal aspect cannot prove a diagnosis, relationship outcome or future incident, and a transit requires actual natal contact and context before a specific claim is justified.