Real astronomy and dated history, with sources. Documented traditions and folklore. Modern lunar astrology · symbolic, not predictive.

Aspects · Beginner

Major aspects

Also called Ptolemaic aspects

Conjunction, sextile, square, trine and opposition: the five aspects this site calculates.

Ptolemy recognised these five because they link signs of related element or modality. Nearly every tradition uses them.

Kind: Tradition
Tradition: Shared across Western traditions
In this site’s birth chart: used

Ptolemy, Tetrabiblos I.13, “Of the Aspects of the Signs” (Robbins translation, 1940) (opens in a new tab) historical

Written for Cool Moon Facts in its own words. An astrology source documents what astrologers believe or practise; it does not establish that astrology works.

All terms · Your birth chart

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Major aspects

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Major aspects

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