The whole sky, on one page

Astrology Cheat Sheet

Signs · Planets · Houses · Elements · Aspects · Everything you need to read a chart, in O’Mara’s words

What a chart
is actually made of

A birth chart looks complicated and is, underneath, only four ideas stacked together. There is a sign, which is a style, a way of going about a thing. There is a planet, which is the thing being done, the part of you in question. There is a house, which is the area of life it happens in. And there are aspects, which describe how the parts get along with one another. A planet, in a sign, in a house, holding a conversation with the other planets. That is the entire grammar. Everything below is just vocabulary for those four.

This page is the quick reference, the whole sky on one screen. Each sign links to its full personality portrait if you want the long, honest version. The deeper guides to the planets, houses and aspects will hang off this page as they are written. For now, this is the map you can keep open in a tab.

Signs: the
twelve styles

A sign is not a personality. It is a style, a way of doing whatever a planet does. The Sun in Aries and the Sun in Libra both shine; one shines by charging forward, the other by weighing things up. Each sign has an element (its temperament), a modality (how it moves), and a ruling planet (the engine behind it). The traits below are the shorthand. The full portrait of each sign, the honest one including the difficult parts, is one click away.

GlyphSignDatesElementModeRulerIn a phrase
Aries glyphAries21 Mar – 19 AprFireCardinalMarsThe one who goes first
Taurus glyphTaurus20 Apr – 20 MayEarthFixedVenusThe one who will not be rushed
Gemini glyphGemini21 May – 20 JunAirMutableMercuryThe one who has to know
Cancer glyphCancer21 Jun – 22 JulWaterCardinalMoonThe one who makes a home of it
Leo glyphLeo23 Jul – 22 AugFireFixedSunThe one who warms the room
Virgo glyphVirgo23 Aug – 22 SepEarthMutableMercuryThe one who fixed it before you noticed
Libra glyphLibra23 Sep – 22 OctAirCardinalVenusThe one who weighs it back to fair
Scorpio glyphScorpio23 Oct – 21 NovWaterFixedPlutoThe one who sees straight through it
Sagittarius glyphSagittarius22 Nov – 21 DecFireMutableJupiterThe one already eyeing the horizon
Capricorn glyphCapricorn22 Dec – 19 JanEarthCardinalSaturnThe one still climbing
Aquarius glyphAquarius20 Jan – 18 FebAirFixedUranusThe one a step outside the circle
Pisces glyphPisces19 Feb – 20 MarWaterMutableNeptuneThe one who feels the whole room

A sign is not who you are. It is the accent you do everything in. The chart is the sentence; the sign is only how it is spoken.

The temperaments
underneath

Every sign is one of four elements and one of three modalities. Learn these six ideas and you can half-read a sign you have never studied, because the element tells you its temperament and the modality tells you how it moves through the world.

Fire

Aries, Leo, Sagittarius. Drive, warmth, faith, the impulse to act and to inspire. Burns bright, sometimes burns out.

Earth

Taurus, Virgo, Capricorn. Practicality, patience, the made and the lasting. Builds slowly, holds firm.

Air

Gemini, Libra, Aquarius. Thought, language, connection, perspective. Lives a little above the ground, on purpose.

Water

Cancer, Scorpio, Pisces. Feeling, memory, intuition, depth. Reads the room before the room has spoken.

Cardinal

Aries, Cancer, Libra, Capricorn. The starters. They begin things, open seasons, set things moving.

Fixed

Taurus, Leo, Scorpio, Aquarius. The sustainers. They hold, deepen, refuse to be hurried off course.

Mutable

Gemini, Virgo, Sagittarius, Pisces. The adapters. They bend, change, end one season and ready the next.

Planets: the
parts of you

If the sign is the style, the planet is the function, the actual part of you it describes. The Sun is your core, the Moon your inner weather, Mercury your mind, and so on outward. The personal planets move fast and shape the individual; the social and outer planets move slowly and shape a whole generation through one person. A fuller guide to each planet will live here in time. This is the shorthand.

GlyphPlanetGovernsAsk of it
SunCore self, vitality, what you are becomingWho am I, at centre?
MoonEmotion, instinct, what makes you feel safeWhat do I need?
MercuryMind, communication, how you think and speakHow do I process it?
VenusLove, beauty, value, what draws youWhat do I want, and how do I love?
MarsDrive, desire, anger, how you act and pursueHow do I go after it?
JupiterGrowth, faith, luck, where you expandWhere do I reach for more?
SaturnLimits, time, discipline, what you must earnWhere is the work?
UranusChange, freedom, the unexpected, where you break formWhere am I different?
NeptuneDream, compassion, illusion, where edges dissolveWhere do I long, and where do I lose myself?
PlutoPower, depth, transformation, what is remadeWhat must die so I can change?
North NodeThe growth direction, the unfamiliar workWhere am I being asked to go?
ChironThe old wound, and the healing you can give from itWhere do I hurt, and help?

The planets are not forces acting on you. They are the cast of you, each one a part you were always going to have to play.

The planets in full detail

Houses: where
it all happens

The sign is the style, the planet is the function, and the house is the setting, the actual area of life where it plays out. The same Mars wants the same things in everyone; in the tenth house it pushes a career, in the seventh it pushes a relationship. Twelve houses, twelve arenas, running from the most personal to the most collective. A deeper page for each will live here in time.

HouseRulesThe question it asks
FirstSelf, body, the first impression, how you arriveHow do I show up?
SecondMoney, possessions, values, self-worthWhat is mine, and what is it worth?
ThirdMind, siblings, the near world, everyday speechHow do I communicate close to home?
FourthHome, roots, family, the private inner groundWhere do I come from?
FifthCreativity, romance, children, playWhat do I make for the joy of it?
SixthWork, health, service, daily routineHow do I tend the day to day?
SeventhPartnership, marriage, the close otherWho do I meet as an equal?
EighthIntimacy, shared resources, death, transformationWhat do we share, and what changes me?
NinthBelief, travel, higher study, meaningWhat do I believe, and how far do I go?
TenthCareer, status, reputation, the public selfWhat am I known for?
EleventhFriends, groups, hopes, the wider circleWho are my people, and what do we want?
TwelfthThe hidden, solitude, surrender, the inner seaWhat lives in me out of sight?
The twelve houses in full detail

Aspects: how the
parts get along

An aspect is the angle between two planets, and it describes the relationship between those two parts of you. Some angles are easy and some are friction, but easy is not always good and friction is not always bad. The hard aspects are where the growth tends to be; the soft ones are the talents you barely notice you have.

AspectAngleNatureWhat it feels like
ConjunctionIntense, blendedTwo parts fused, acting as one, for better and worse
Sextile60°Easy, availableA door that opens if you walk through it
Square90°Tension, driveFriction that forces growth, the productive grit
Trine120°Flowing, giftedA talent so natural you forget it is rare
Opposition180°Polarity, balanceA see-saw between two needs, asking to be balanced not won
Aspects in full detail

How to actually
read a chart

Now the four ideas combine into one sentence. Take any planet. Read it as: this part of me (the planet), does its thing in this style (the sign it is in), in this area of life (the house it is in), and gets on with the rest of me like this (its aspects). Moon in Capricorn in the seventh house reads, roughly, as my emotional needs are met through structure and self-reliance, and they play out in close partnership. That is a real reading. You just did it.

Begin with the big three and you will already understand most of someone. The Sun is the core self, the project of a life. The Moon is the inner weather, what you need to feel safe. The Rising sign, the sign on the horizon at your birth, is the doorway, how you arrive and how the world first reads you. Sun for who you are becoming, Moon for what you need, Rising for how you meet the world. Most of the rest is detail hung on that frame.

And then stop treating it as a verdict. A chart is not a sentence passed on you. It is a description of the instrument; the music is still yours to play. Read it for what is useful, leave what is not, and let it be a language rather than a law.

A note on how to use astrology: This reference is a symbolic and interpretive art, not a predictive science. If something resonates, that is what matters. Astrology works best when it feels useful rather than literal. The sky offers a language; what you do with it is yours entirely.

Read who each sign really is

The cheat sheet is the map. The personality portraits are the territory, each sign written in full, the honest version, including the parts most horoscopes leave out.

The twelve portraits Get your free natal chart
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