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Astrology basics

The four building blocks of a birth chart

A 90-second primer before you fill in your birth details — no jargon, just what each piece actually means.

Planets — what kind of energy

Each planet represents a different kind of energy: the Sun = core identity, the Moon = inner emotions, Mercury = communication, Venus = love and values, Mars = drive and assertiveness. Where each planet sat on your birth date is the starting point of a reading.

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Signs — how it's expressed

The 12 zodiac signs are the "style" each planet's energy comes out in. The same planet in a different sign feels different — Mars in Aries is blunt and direct, while Mars in Virgo is careful and methodical.

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Houses — which area of life

The 12 houses divide the sky based on your exact birth time and place. Each house represents a different life area — house 10 = career, house 7 = partnerships. This is why an accurate birth time matters.

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Aspects — how planets talk to each other

When two planets form a meaningful angle (like 0°, 90°, or 120°), their energies interact — some angles are supportive, others create tension. This is what makes a full reading more nuanced than looking at just one sign.

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The 10 planets

Each planet governs a different part of you — from the fast-moving personal planets to the slow outer planets that shape long life themes.

Luminaries

SUN

Sun

Core identity and sense of purpose — where you shine.

MOON

Moon

Inner emotions and what makes you feel secure day to day.

Personal planets

MER

Mercury

How you think, communicate, and learn.

VEN

Venus

Love, values, and the beauty or pleasure you're drawn to.

MAR

Mars

Drive, action, and how you go after what you want.

Social planets

JUP

Jupiter

Growth, opportunity, and where you find meaning.

SAT

Saturn

Discipline, boundaries, and the lessons you grow through.

Outer planets

URA

Uranus

Sudden change, independence, and breaking from convention.

NEP

Neptune

Imagination, intuition, and dreams.

PLU

Pluto

Deep transformation and power dynamics.

The 12 zodiac signs

Your sun sign is just where the Sun sat on your birth date — the sign each planet moves through is what shapes the rest of the reading.

ARIAries21 Mar – 19 AprFireBold, direct, competitive
TAUTaurus20 Apr – 20 MayEarthSteady, sensual, patient
GEMGemini21 May – 20 JunAirCurious, witty, adaptable
CANCancer21 Jun – 22 JulWaterNurturing, intuitive, protective
LEOLeo23 Jul – 22 AugFireWarm, expressive, confident
VIRVirgo23 Aug – 22 SepEarthPrecise, practical, helpful
LIBLibra23 Sep – 22 OctAirDiplomatic, social, harmony-seeking
SCOScorpio23 Oct – 21 NovWaterIntense, private, transformative
SAGSagittarius22 Nov – 21 DecFireAdventurous, honest, philosophical
CAPCapricorn22 Dec – 19 JanEarthAmbitious, disciplined, patient
AQUAquarius20 Jan – 18 FebAirIndependent, inventive, idealistic
PSCPisces19 Feb – 20 MarWaterDreamy, empathetic, intuitive

The 12 houses

Whichever house a planet falls in tells you which of these life areas its energy shows up in.

1

Identity

How you come across, your appearance, and your instinctive approach to life.

2

Resources

What you value, how you earn, and your relationship with material security.

3

Communication

How you think, talk, learn, and connect with siblings and neighbors.

4

Home & Roots

Your family, upbringing, and the private foundation you build your life on.

5

Creativity & Romance

Self-expression, romance, pleasure, and creative or playful pursuits.

6

Work & Health

Daily routines, physical wellbeing, and how you're of service.

7

Partnerships

Marriage, close relationships, and one-on-one commitments — business or romantic.

8

Transformation

Shared resources, intimacy, and how you handle loss and deep change.

9

Beliefs & Exploration

Higher learning, travel, philosophy, and your search for meaning.

10

Career & Reputation

Your public role, ambitions, and how the world sees your achievements.

11

Community & Hopes

Friendships, social groups, and your long-term hopes and goals.

12

The Unconscious

Solitude, hidden patterns, rest, and what happens behind the scenes.

Written and maintained by the AiRA team · Last updated 4 September 2026