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Astrology Terminology in Simple Terms

Astrology Terminology in Simple Terms

This fundamental astrological glossary contains clear and accurate definitions of 72 key terms of classical and modern natal astrology that I use in my consultations and research work. Here, all core elements of analysis are gathered — from the structure of the natal chart, luminaries, and planets to aspects, rare configurations, predictive methods (transits, solar returns, progressions), and depth psychological astrology. Without detached pretentiousness, but with reverence for the symbolic precision of the ancient science of stars.

Rooted in fundamental primary sources of world astrology:
🏛️

Howard Sasportas

"The Twelve Houses" — the definitive classic guide to the sectors of the natal chart and the arenas of human life experience.

🧠

Liz Greene and C. G. Jung

Psychological astrology, archetypes of the collective unconscious ("Saturn", "Relating"), and the deep transformation of the shadow.

✨

Robert Hand and Stephen Arroyo

"Planets in Transit" and energetic elemental astrology — dynamics of planetary cycles, aspects, and points of free conscious choice.

"A natal chart is a person's astrological passport, a living map of their energetic potential and inner resources. The planets do not compel or dictate fatality — they reveal the quality of cosmic time within which we make our own free conscious choice."

Stephen Arroyo and Liz Greene psychological and humanistic astrology
Terms 1–11

I. Natal Chart Core Concepts (11 terms)

The fundamental astrological coordinate system: celestial sphere, horizon points, and foundational astronomical lines forming a personal horoscope.

Natal Chart

#1
A personalized astrological blueprint of the sky calculated for the exact time, date, and geographic location of a person's birth, charting the precise positions of planets, signs, and houses. Astrologer Stephen Arroyo describes it as a map of an individual's energetic potential. It is used to analyze personality traits, innate talents, karmic lessons, and life purpose. A natal chart is an individual's astrological passport, containing their inner blueprint, latent potential, and decision points within external circumstances.
📚 Primary Source: Stephen Arroyo, "Astrology, Karma and Transformation".

Horoscope

#2
In a broad sense, any forecast constructed on the basis of planetary positions; in its precise meaning, a synonym for the natal chart. In popular culture, the term is most frequently applied to simplified Sun-sign predictions without considering the exact time and place of birth.

Cosmogram

#3
A simplified diagram of planetary placements across zodiac signs at the time of birth, constructed without a house system or Ascendant. It is calculated when the exact birth time is unknown: it provides an overall psychological profile but does not allow for the analysis of specific life domains.

Ecliptic

#6
The apparent annual path of the Sun across the celestial sphere, along which the zodiac belt is situated. All classical planets travel near the ecliptic, making it the primary reference plane for calculating their positions in the natal chart.

Ascendant (AC)

#7
The zodiac sign rising on the eastern horizon at the exact moment of birth; the first and most personal point of the natal chart. It defines physical appearance, manner of self-presentation, and initial style of engaging with the world. Unlike the Sun, the Ascendant represents the outer "facade," the first response in new situations, and the starting behavioral strategy.
📚 Primary Source: Dane Rudhyar, angular points concept ("An Astrological Mandala").

Descendant (DC)

#8
The point directly opposite the Ascendant: the zodiac sign on the western horizon at the moment of birth. It governs the realm of partnerships, indicating the qualities one seeks in others and projects onto partners. The Ascendant–Descendant axis illustrates the dynamic balance between "self" and "other."

Midheaven (MC)

#9
The highest point of the ecliptic above the horizon at the moment of birth; the cusp of the 10th House. It signifies social status, vocation, career, highest life ambitions, and visible worldly achievements.

Imum Coeli (IC)

#10
The lowest point of the chart directly opposite the Midheaven; the cusp of the 4th House. It describes psychological roots, ancestral lineage, home life, connection to heritage, and the foundation of emotional security.

Cusp

#11
The boundary marking the beginning of an astrological house or sign. A planet located right on a cusp manifests its qualities with heightened potency, setting the tone for the entire domain of that house.
Terms 12–24

II. Planets in the Natal Chart (13 terms)

Active dynamic forces of the natal chart: personal luminaries, social mentors, and outer generational transformers.

Sun in the Natal Chart

#12
The primary luminary, symbol of core identity and vital life force, the inner "captain": who a person is at the deepest foundational level. It indicates the principal direction of self-realization according to sign and house. The Sun represents the central core of consciousness, whereas the Ascendant describes the external demeanor.

Jupiter in the Natal Chart

#17
The planet of expansion, good fortune, higher wisdom, worldview, optimism, generosity, and social advancement. It designates the area of life offering greatest growth, expansive opportunities, and faith in one's capabilities.

Saturn in the Natal Chart

#18
The planet of structure, time, discipline, responsibility, limitation, patience, and maturity. It highlights the life arena of primary developmental lessons, overcoming deep fears, and forging inner backbone. In psychological astrology (Liz Greene), Saturn is viewed not as a malevolent malefic, but as the great Teacher.
📚 Primary Source: Liz Greene, "Saturn: A New Look at an Old Devil".

Uranus in the Natal Chart

#19
The transpersonal planet of epiphanies, liberation, independence, individuality, revolutionary shifts, and technological breakthroughs. It symbolizes shattering outdated structures for authentic renewal and intuitive foresight into the future.

Neptune in the Natal Chart

#20
The transpersonal planet of intuition, mysticism, dreams, illusions, spirituality, unconditional love, creative inspiration, and imagination. It connects the personality with transcendent realities, governing artistic flow and boundless compassion.

Pluto in the Natal Chart

#21
The transpersonal planet of profound transformation, personal power, crises, rebirth, collective will, and latent psychic reserves. It embodies the Phoenix archetype — the death of the old to birth a fundamentally elevated quality of self.

House Ruler

#24
The planet ruling the zodiac sign in which a house cusp falls. It connects that house's affairs to the planet's placement elsewhere in the chart, revealing where resources are drawn from and where the house's energy is directed.
Terms 25–47

III. Points and Configurations of the Natal Chart (23 terms)

Hypothetical points, asteroids, essential planetary dignities, and geometric patterns of the natal chart.

Part of Fortune (Pars Fortunae)

#27
An Arabic lot calculated mathematically from the relative positions of the Ascendant, Sun, and Moon. It highlights the life arena where one naturally attains prosperity, inner contentment, and an authentic sense of fulfillment.

Stellium

#28
A conjunction cluster of three or more planets in a single zodiac sign or astrological house. It concentrates intense energy, elevating that sign's or house's themes into a focal life focus.

Grand Trine

#29
A harmonious closed configuration formed by three planets linked by trine aspects (120°), typically positioned across signs of the same element. It bestows innate talent, effortless self-expression, and enduring energetic support.

T-Square

#30
A dynamic, high-tension configuration consisting of two planets in opposition (180°), each squaring (90°) a third focal apex planet. It acts as an intense catalyst for inner tension and the primary engine driving growth and achievement.

Yod ("Finger of Fate")

#31
An aspect pattern ("Finger of God") comprising a sextile (60°) between two planets, both forming quincunxes (150°) to a third apex planet. It signifies a karmic call for continual consciousness realignment and a specialized life mission.

Exaltation of a Planet

#32
A planet's placement in a zodiac sign where its archetypal traits express themselves with maximum clarity, prestige, and theatrical prominence, albeit sometimes accompanied by a degree of overstatement.

Detriment (Exile)

#33
A planet's placement in the sign opposite its home domicile (rulership). In detriment, a planet struggles to express its innate virtues directly, requiring compensatory adaptation and unconventional avenues of expression.

Fall of a Planet

#34
A planet's placement in the sign opposite its exaltation. It is regarded as an arena of underlying psychological vulnerability and friction that necessitates profound inner maturation.

Unaspected Planet

#35
A planet ("feral planet") forming no major Ptolemaic aspects with other celestial bodies in the chart. It tends to act autonomously and unpredictably, operating outside direct conscious control.

Lord of the Geniture (Chart Ruler)

#36
The planetary ruler of the Ascendant sign. It is considered the chief helmsman of the natal chart, characterizing life orientation, psychological perspective, and overarching destiny vector.

Astrological House

#37
One of the 12 divisions of the local horizon coordinate system, governing a tangible arena of human experience (identity, wealth, family, career, wellness, marriage, crises). The houses define "where" and "against what backdrop" planetary energies unfold.
📚 Primary Source: Howard Sasportas, "The Twelve Houses".

Elements in Astrology

#38
The four primal building blocks (Fire, Earth, Air, Water) shaping temperament and basic psychological orientation. The elemental balance in a chart reveals the medium through which an individual perceives reality and initiates action.
📚 Primary Source: Stephen Arroyo, "Astrology, Psychology, and the Four Elements".

Modalities (Qualities of Signs)

#39
Three dynamical expressions of zodiacal energy: Cardinal (initiative, launching), Fixed (sustainment, stability), and Mutable (adaptation, flexibility). They govern how an individual navigates transitions and changes.

Interception

#40
A condition in which an entire zodiac sign is enclosed within a single astrological house without touching its cusps ("intercepted sign"). The qualities of the sign and any enclosed planets emerge later in life and require conscious effort to integrate.

Chiron

#41
A centaur asteroid orbiting between Saturn and Uranus, embodying the archetype of the "Wounded Healer." It pinpoints an area of existential psychological vulnerability, through whose healing an individual awakens the gift of guiding others.
📚 Primary Source: Melanie Reinhart, "Chiron and the Healing Journey".

Juno

#42
One of the four major asteroids, embodying the archetypes of sacred partnership, lawful union, fidelity, balance of power, and relational equality.
📚 Primary Source: Demetra George, "Asteroid Goddesses".

Ceres

#43
The largest asteroid (dwarf planet), personifying the Great Mother archetype, nurturance, unconditional care, productivity, and themes of separation and loss.
📚 Primary Source: Demetra George, "Asteroid Goddesses".

Pallas

#44
The asteroid of practical wisdom, strategic perception, pattern recognition, defense of justice, and creative intellect.
📚 Primary Source: Demetra George, "Asteroid Goddesses".

Vesta

#45
The asteroid of the sacred hearth fire, dedicated focus, vocation, spiritual concentration, and devotion to a transcendent calling above mundane pursuits.
📚 Primary Source: Demetra George, "Asteroid Goddesses".

Persona (in Astrology)

#46
The archetype of the social mask through which an individual interfaces with society, determined by the synthesis of the Ascendant, its ruler, and planets posited in the 1st House.
📚 Primary Source: C. G. Jung, Persona concept; Liz Greene.

Shadow (in Astrology)

#47
Disowned and unintegrated facets of the psyche projected outward onto other people. In the chart, the Shadow is mapped through Pluto, Black Moon Lilith, the 12th House, and heavily challenged planets.
📚 Primary Source: C. G. Jung, Shadow concept; Liz Greene.
Terms 48–55

IV. Planetary Aspects (8 terms)

Angular distances between planets: energetic bridges of dialogue, challenge, and harmony in the natal chart.

Trine (120°)

#48
A harmonious major aspect of 120° between planets, typically joining signs of the same element. It represents innate talent, fortunate circumstances, unobstructed energy flow, and mutual resonance between planetary principles.
📚 Primary Source: Robert Hand, "Horoscope Symbols".

Square (90°)

#49
A dynamic, challenging aspect of 90° between planets demanding immediate action and the resolution of internal friction. It serves as the primary engine of personal growth and worldly achievement through crisis.

Sextile (60°)

#50
A supportive harmonious aspect of 60° linking complementary elements (Fire–Air or Earth–Water). It offers beneficial opportunities and avenues that require conscious engagement and deliberate effort to blossom.

Opposition (180°)

#51
A high-tension aspect of 180° between planets in opposing signs. It signifies polarization, the necessity of compromise, reconciliation of polar opposites, and working through relational projections.

Conjunction (0°)

#52
The most potent major aspect (0°), in which planets occupy the same zodiacal degree. It fuses their archetypes into a single concentrated focus of energy, whose flavor depends on the nature of the participating planets.

Quincunx (Inconjunct, 150°)

#53
A minor aspect of 150° requiring subtle ongoing psychological adjustments and realignment. It connects signs sharing neither element nor modality.

Semisextile (30°)

#54
A minor harmonious aspect of 30° between adjacent zodiac signs. It reflects an incipient spark of collaboration, incremental familiarization, and quiet mutual assistance.

Orb (Orbis)

#55
The allowable angular deviation from an exact aspect degree within which the aspect remains operative. Luminaries and major aspects command wider orbs (up to 8–10°), while minor aspects require tighter margins (1–2°).
Terms 56–64

V. Forecasting and Predictive Techniques (9 terms)

Classical and modern predictive methods: unwinding natal chart time into real life events.

Transit

#56
A predictive methodology examining the current real-time motion of planets across the sky in relation to their natal birth chart positions.
📚 Primary Source: Robert Hand, "Planets in Transit: Life Cycles for Living".

Progressions (Secondary)

#58
A symbolic predictive method equating one day of planetary motion after birth to one year of lived experience (secondary progressions). It maps the evolutionary unfoldment of the psyche over time.

Directions (Primary / Solar Arc)

#59
A symbolic predictive technique ("primary directions" or solar arc directions) advancing all chart points at a rate of 1 degree per 1 year of life. It helps locate decisive turning points and watershed life events.

Solar Return

#60
An astrological chart cast for the exact moment the transiting Sun returns annually to its natal birth degree, occurring on or near one's birthday. It outlines the defining themes and developments of the personal year ahead, calculated for the individual's location at that birthday moment.

Lunar Return

#61
A chart calculated for the monthly return of the Moon to its exact natal degree. Unlike a Solar Return covering a full year, a Lunar Return reflects the emotional climate and focal themes of the coming month.

Eclipse

#62
An astronomical and astrological phenomenon occurring when a New or Full Moon takes place near the Lunar Nodes. Solar and Lunar eclipses operate as catalysts for accelerated transformation, triggering developments that have been gestating long before the eclipse itself.

Ephemeris

#63
Astronomical data tables charting the precise daily zodiacal coordinates of the Sun, Moon, and planets across specified epochs. An astrologer's fundamental reference tool for erecting charts and tracing transits.

Birth Time Rectification

#64
The investigative technique of determining or fine-tuning an uncertain birth time through correlating chronological biographical events with predictive chart triggers, particularly to verify the exact Ascendant and house cusps.
Terms 65–72

VI. Other Key Concepts (8 terms)

Synastry of relationships, lunar nodes, lunar rhythms, and major schools of astrology.

Composite Chart

#66
A single unified chart of a partnership calculated from mathematical midpoints between the respective planets and angles of two individuals. It illustrates the relationship itself as an autonomous, living entity.
📚 Primary Source: Robert Hand, "Planets in Composite".

Lunar Nodes

#67
The North and South Nodes, the two intersection points where the Moon's orbital path crosses the ecliptic, foundational to karmic astrology. The South Node depicts familiar past experiences and ingrained behavioral defaults, while the North Node illuminates the evolutionary horizon and unfamiliar skills to develop in this lifetime. The nodal axis marks the primary path of personal evolution.

Lunar Day

#69
The period elapsed between two consecutive moonrises (approx. 24–25 hours), which does not coincide with standard solar calendar days; a synodic lunar month encompasses 29 to 30 such days. Each Lunar Day carries its distinct energetic qualities and recommendations for mindful action or restraint.

Karmic Astrology

#70
A specialized branch regarding the natal chart as a reflection of lessons and unfinished business carried over by the soul from past cycles, placing central focus on the Lunar Nodes and Saturn. Its purpose is the conscious realization and resolution of life lessons.
📚 Primary Source: Martin Schulman, "Karmic Astrology" series.

Psychological Astrology

#71
An approach interpreting the natal chart as a psychological blueprint of potential, drawing upon Carl Gustav Jung's theories of archetypes and individuation. A prominent pioneer is Liz Greene, author of "Saturn: A New Look at an Old Devil".
📚 Primary Source: Liz Greene, "Saturn: A New Look at an Old Devil".

Horary Astrology

#72
An ancient branch of astrology wherein a chart is cast for the precise moment a client asks a specific, pressing question to an astrologer, rather than based on birth data. It is employed to obtain a definitive answer on a concrete matter without requiring the querent's birth time.
📚 Primary Source: William Lilly, "Christian Astrology" (1647).

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