What Is Astrology?

Astrology is the practice of reading meaning into the positions of the Sun, Moon and planets — most often as they stood at the moment someone was born. It is not a claim that Mars is reaching down and making you argue with your sister. It is a symbolic language: a set of images old enough and rich enough that people have found their own lives described in it for thousands of years.

The useful question is not really "is it true?" but "what is it for?" Astrology gives you vocabulary for parts of yourself that are otherwise hard to name — why you need three hours alone after a party, why you keep starting things you do not finish, why a particular kind of person keeps appearing in your life. Whether the sky causes any of that or merely describes it, the description can be sharp enough to be worth having.

Where it came from

Astrology and astronomy were the same subject for most of recorded history. Babylonian priests kept careful records of planetary positions alongside floods, harvests and the fortunes of kings, looking for patterns. The Greeks inherited those records and added the birth chart — the radical idea that the sky belonged to an individual life, not only to the state.

From there it travelled through the Islamic world, where it was refined and preserved, into medieval and Renaissance Europe, where it was taught in universities and used by physicians and monarchs alike. The split between astronomy and astrology came late, with the scientific revolution. What survived is the interpretive half: a symbolic system, no longer making claims about physics.

The birth chart

A birth chart — also called a natal chart — is a map of the sky from one place, at one moment. Give it a date, an exact time and a location, and it shows where every planet stood from that point on Earth.

It is drawn as a wheel. Reading it means combining three things:

The planets are what — the drives and functions. The Sun is your core self, the Moon your inner emotional world, Mercury how you think and speak, Venus how you love and what you find beautiful, Mars your drive and anger, Jupiter what expands, Saturn what limits and matures you.

The signs are how — the style each planet operates in. Mars in Aries acts immediately; Mars in Libra weighs it up first, then acts. Same drive, different manner.

The houses are where — the twelve areas of life a planet's energy plays out in: home, work, relationships, money, travel, and so on. The houses depend entirely on your birth time, which is why an exact time matters so much.

Then there are aspects: the angles planets make to one another, which describe whether two parts of you cooperate or fight.

Sun, Moon and rising

Most people know only their Sun sign, which is what a magazine horoscope means by "your sign". It is the biggest single piece, but it is one of three that shape how you come across.

• Sun sign — your core self, what you are growing toward. Determined by your birth date alone.
• Moon sign — your inner life: what you feel, what soothes you, what you need to be safe. Needs the date and roughly the time.
• Rising sign, or ascendant — the sign that was coming over the horizon at your birth. It sets how you appear to others and the whole structure of your houses. Needs an accurate birth time, ideally to the minute.

If a Sun-sign description has never felt like you, the Moon and rising are usually where the recognition happens.

What astrology cannot do

It will not tell you the date you will meet someone, or which of two job offers to accept. Anyone who says otherwise is selling certainty, which is a different product.

What a chart offers is a set of tendencies and tensions — a description of the raw material. It says nothing about what you will build with it. Two people born minutes apart in the same hospital have nearly identical charts and completely different lives.

Used well, astrology is a mirror rather than a script. If a reading only makes you feel fated, it is not doing its job. If it makes you notice a pattern you had been repeating without seeing it, it is.

Where to start

Start with your own chart. You need your birth date, your birth time — check a birth certificate if you can, since memory is unreliable here — and your city of birth. Look up your Sun, Moon and rising, and read all three together rather than separately.

Then take one placement at a time. Astrology is large, and trying to swallow it whole is the fastest way to bounce off it. Learn what your Moon sign wants. Notice, over a month, whether that is true. Then move on to the next.