What is a birth chart?

A birth chart is a map of where the Sun, Moon, and planets sat in the sky at the exact moment and place you were born. Astrologers read it as a symbolic portrait of temperament and tendency.

How often do Astrarium horoscopes update?

Daily readings for all twelve signs refresh every night at local midnight, alongside the observatory's live moon phase and sky data.

Is astrology a science?

No. Astrology is a symbolic tradition thousands of years old, not a science. Astrarium treats it as a lens for reflection and storytelling, never as medical, financial, or legal guidance.

Astrarium — Horoscopes, Birth Charts & Tonight's Sky

Ephemeris · Loading tonight's sky

Astrarium is a living observatory for astrology. Spin the armillary above to explore all twelve constellations, read tonight's real moon, and cast a birth chart from your exact moment. The whole world moves because the sky does.

Chart your sky Enter the Twelve

Plate I · The Atlas

Twelve constellations. Twelve doors.

The zodiac is a band of real constellations the Sun appears to travel through each year. Hover a sign to watch its stars connect — then step through. Each door opens a full deep-dive: myth, meaning, houses, and the people who carry it.

New to astrology?

There is a guided route through the observatory — about thirty minutes, in the order that actually builds understanding.

Start here

Plate · The Grammar

Every chart is a sentence.

The signs are only one word of three. To read a sky, you also need the planets and the houses — what is speaking, and where. Together they turn twelve symbols into a language.

The HowThe Twelve SignsThe manner of the sky — how a force expresses itself. Fire, earth, air, water, in twelve voices.Enter the Twelve →

The WhatThe Ten WanderersThe planets — what is actually moving. Sun, Moon, and eight true planets, each an archetype at work.Meet the planets →

The WhereThe Twelve HousesThe arenas of life — where a story plays out. From the body and money to career and the hidden deep.Walk the houses →

Go further:Live Sky Map·The Orrery·Elements·Aspects·Your Big Three·Almanac·Moon Phases·Compatibility·Straight Answers·Lexicon

The Observatory Floor

The sky above you, right now.

Not a diagram of an idealised sky — a live chart of yours. Every zodiac constellation placed where it actually sits from where you are standing, with the Sun, the Moon and the ecliptic they travel along.

Open the sky map →

Plate II · The Instrument Panel

Tonight, measured.

The moon below is not an illustration — it is tonight's actual phase, computed from the real date the moment you arrived. The observatory keeps time with the sky, not with us.

Tonight's Moon

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— illuminated

Next full moon · —

Next new moon · —

Sky Note

Mercury stations direct this week — contracts and conversations loosen their knots.

The full build wires this tile to a live planetary almanac.

Sample data

Visible Tonight

Jupiter rises late in the east; Saturn holds the southern sky till dawn.

Computed per visitor location once the almanac feed is connected.

Sample data

Plate III · Daily Readings

Your sign, tonight.

Daily horoscopes are short readings tied to the current positions of the Sun, Moon, and planets. Ours refresh nightly at midnight — return each evening and your observatory log grows.

Observatory log — night 1

Sample readings — the live nightly engine ships with the full build

Visual Guide · How to Read It

Anatomy of a birth chart.

Four things sit on every chart wheel. Once you can name them, the rest is detail.

1 · The outer ring — the signsTwelve equal thirty-degree slices, Aries to Pisces. They colour how a force behaves.

2 · The inner wedges — the housesTwelve arenas of life, from your body to your career. They locate where it plays out.

3 · The symbols on the wheel — the planetsTen moving lights, each an archetype. They are what is actually happening.

4 · The lines across the middle — the aspectsThe angles between planets, deciding whether they cooperate or collide.

Cast your chart Start from the beginning

Plate IV · The Centerpiece Tool

Cast your birth chart.

A birth chart maps where every planet sat at your exact first moment. The full tool renders yours as an interactive wheel you can rotate, question, and keep.

The interactive wheel computes your Sun and Moon from real astronomy — cast your chart →

Plate · The Instruments

Four ways to look up.

LiveSky Map

InteractiveThe Orrery

TonightThe Almanac

Hands-onAspects

Plate V · The Night Ledger

One letter, every new moon.

A monthly dispatch from the observatory: the month's sky in plain language, one deep-dive, one thing worth looking up at. No noise between moons.