Chart functions
The Planets in Astrology
The Sun, Moon and planets are the active functions of a birth chart. They describe different jobs: identity and vitality, emotional regulation, perception, attraction, pursuit, growth, structure and long-cycle change.
A planet is not a full personality label. Its sign describes how the function operates, its house describes where it operates, and its aspects describe how it exchanges energy with other functions. The complete chart is the verification layer.
Editorial review by Luis PhamMethodology
The planetary system
Luminaries
The Sun and Moon are treated as chart lights: conscious direction and vitality meet emotional regulation, safety and instinctive response.
Personal planets
Mercury, Venus and Mars describe perception and communication, values and reciprocity, then activation and pursuit. Their signs and houses make those functions specific.
Social and outer planets
Jupiter and Saturn describe growth and structure, while Uranus, Neptune and Pluto move more slowly and add generational or long-cycle context to a personal chart.
Explore each planetary function
Start with the function, then follow it through signs, houses and aspects. A reference page explains the ontology; your calculated chart supplies the placement and modifiers.
luminary planets
personal planets
- MercuryPerception and communication: the chart's way of sorting information, forming links and revising meaning.
- VenusValue and reciprocity: what a chart approaches, enjoys, offers and needs to keep an exchange workable.
- MarsAction and assertion: how a chart starts, protects, pursues and spends effort when it meets resistance.
social planets
outer planets
- UranusAutonomy and discontinuity: the collective systems a generation questions, made personal by house and close aspects.
- NeptuneImagination and ideals: a generation's symbolic field, translated personally through boundaries, house and aspects.
- PlutoPower and regeneration: a slow collective process that becomes personal through house and close contacts.
See your planets in context
Calculate a birth chart to see every planet's sign, house and aspects together instead of isolating one planetary keyword.
Calculate your birth chart