Astrology Glossary
Your complete guide to astrology terms — from basic zodiac concepts to advanced chart reading techniques. 30 terms and counting.
Chart Components
Houses
Also known as: Astrological Houses, The Twelve Houses
Twelve sections of the birth chart that represent different areas of life, from identity to career to relationships.
Aspects
Also known as: Planetary Aspects
The angles formed between planets in a birth chart, showing how different parts of your personality interact.
Planets in Astrology
Also known as: Celestial Bodies, Luminaries and Planets
The Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto — each governing different aspects of life.
Venus Sign
Also known as: Venus Placement
The zodiac sign Venus was in when you were born, revealing how you love, what you find beautiful, and what you value.
Mars Sign
Also known as: Mars Placement
The zodiac sign Mars was in when you were born, revealing how you assert yourself, handle conflict, and pursue desires.
North Node
Also known as: Rahu, True Node
A calculated point in your chart representing your soul's purpose and the life lessons you're meant to learn.
South Node
Also known as: Ketu, Descending Node
The point opposite your North Node, representing innate talents, comfort zones, and patterns you're meant to evolve beyond.
Stellium
Also known as: Planetary Cluster
Three or more planets clustered in the same zodiac sign or house in a birth chart, creating concentrated energy.
Midheaven
Also known as: MC, Medium Coeli
The highest point of your birth chart, representing your public image, career path, and life ambitions.
Core Concepts
Rising Sign
Also known as: Ascendant
The zodiac sign that was on the eastern horizon at the exact time you were born.
Sun Sign
Also known as: Star Sign, Zodiac Sign
The zodiac sign determined by the position of the Sun at the time of your birth — your main sign.
Moon Sign
Also known as: Lunar Sign
The zodiac sign the Moon was in at the time of your birth, representing your emotional inner world.
Natal Chart
Also known as: Birth Chart, Astrological Chart
A map of exactly where all the planets were at the precise moment and location of your birth.
Cusp
Also known as: On the Cusp, Cusp Sign
Being born on the boundary between two zodiac signs, often within a day or two of the transition.
Ruling Planet
Also known as: Planetary Ruler, Sign Ruler
The planet that has the most influence over a zodiac sign and shapes its core energy.
Planetary Motion
Retrograde
Also known as: Rx, Apparent Retrograde Motion
When a planet appears to move backward in the sky from Earth's perspective, often associated with delays and review.
Mercury Retrograde
Also known as: Mercury Rx
A period (roughly 3 times per year) when Mercury appears to move backward, famously linked to communication mishaps.
Predictive Astrology
Transit
Also known as: Planetary Transit
The current movement of planets through the zodiac and how they activate your birth chart.
Saturn Return
A major astrological milestone that happens around ages 29 and 58 when Saturn returns to the position it was in at your birth.
Void of Course Moon
Also known as: VOC Moon
A period when the Moon makes no more major aspects before entering the next sign — traditionally a time to avoid starting new things.
Solar Return
Also known as: Birthday Chart
A chart cast for the exact moment the Sun returns to its natal position each year — essentially your astrological birthday forecast.
Relationship Astrology
Synastry
Also known as: Relationship Astrology, Chart Comparison
The astrological practice of comparing two birth charts to assess relationship compatibility.
Composite Chart
Also known as: Relationship Chart
A single chart created by finding the midpoints between two people's natal charts, representing the relationship itself as its own entity.
Zodiac Fundamentals
Element
Also known as: Triplicity
One of four fundamental energies (Fire, Earth, Air, Water) that each zodiac sign belongs to.
Modality
Also known as: Quality, Quadruplicity
One of three modes of expression (Cardinal, Fixed, Mutable) describing how each sign takes action.
Cardinal Signs
Also known as: Cardinal Modality
Aries, Cancer, Libra, and Capricorn — the initiators and leaders of the zodiac.
Fixed Signs
Also known as: Fixed Modality
Taurus, Leo, Scorpio, and Aquarius — the stabilisers and builders of the zodiac.
Mutable Signs
Also known as: Mutable Modality
Gemini, Virgo, Sagittarius, and Pisces — the adapters and communicators of the zodiac.
Decan
Also known as: Decanate
Each zodiac sign is divided into three 10-degree sections, adding nuance based on when within the sign you were born.
Zodiac Wheel
Also known as: Zodiac Circle, Ecliptic
The 360-degree circle of the 12 zodiac signs through which the Sun, Moon, and planets appear to travel.
Why Learn Astrology Terms?
Understanding astrology goes far beyond knowing your sun sign. Terms like rising sign, moon sign, houses, and aspects open up a deeper layer of self-knowledge that sun signs alone can't provide. Whether you're reading your birth chart for the first time or exploring synastry with a partner, this glossary has you covered.
We've organised every term by category — from core concepts that every beginner should know, to chart components for intermediate students, to predictive techniques for serious astrology enthusiasts. Bookmark this page and come back whenever you encounter a term you don't recognise.
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