aspect

greek: σχηματισμός (schēmatismos) / σχῆμα (schēma) · latin: aspectus · arabic: نظر (naẓar) / مقابلة (muqābala) / تسديس (tasdīs) / تربيع (tarbīʿ) / تثليث (tathlīth)

Definition

A geometric relationship between two planets or between the signs they occupy. The classical Greek tradition counted aspects between whole signs — Taurus square Leo, Aries opposite Libra — so any planet in one sign was considered aspected to any planet in the related sign, regardless of degree. Later practice tightens the relationship by degree, applying an orb (typically a few degrees of arc) on either side of exactitude. The set of basic aspects is the conjunction (same sign or close degrees), sextile (60°), square (90°), trine (120°), and opposition (180°).

In Tradition

Across Hellenistic, Arabic-Persian, and modern Western tradition, aspects are the primary relational apparatus of the chart: signs and planets that are in aspect see each other and combine their natures, while those in aversion (the 2nd/12th and 6th/8th positions) do not. Trine and sextile are widely classed as fortunate, square and opposition as challenging, with the conjunction taking the nature of the planets involved.

In Practice

When reading a chart, astrologers first identify which planets aspect each other and by what figure. The aspect determines whether two factors blend smoothly (trine, sextile), grind against each other (square, opposition), or fuse (conjunction). Aspect doctrine then governs further refinements: whether the aspect is applying or separating, dexter or sinister, partile (degree-exact) or wide, and which planet has the upper hand in the configuration. In horary and electional work, aspects between significators are the basic evidence used to judge whether a matter will perfect; in natal work they describe how the parts of the personality cooperate or pull against each other; in transit and progression work they time the activation of natal pairs.

Historical Origin

Aspect doctrine is foundational to Hellenistic horoscopic astrology and is codified in Firmicus Maternus' Mathesis Book II Chs XXII-XXIII, where the four Ptolemaic aspects plus the unaspected (ableptum) condition are defined by sign-count arithmetic. Al-Biruni's Tafhim §§373-376 preserves the same doctrine in Arabic vocabulary (naẓar / muqābala / tarbīʿ / tathlīth / tasdīs) with a power-hierarchy from conjunction down to sextile. Holden and Crane both stress that the original mode was whole-sign — the degree-and-orb refinement is a later layer.

Etymology

Origin: Latin / Greek. Meaning: A looking-at; a configuration.

Definition

In Tradition

In Practice

Historical Origin

Etymology

Further Reading