What is a transit? The moving sky meets your birth chart

A transit is a planet in the sky of a given day meeting a point in your birth chart. Your birth chart is fixed at the minute you were born, the planets keep moving, and a transit is the name for the time when a moving planet reaches a place that matters in your chart. Astrologers read transits as themes for a stretch of time, not as predictions of events.

What a transit is

Your birth chart is a map of the sky for the minute and place of your birth. It never changes. The sky does.

A transit compares the two. Think of the birth chart as a still photograph and of the sky on any later date as a transparent sheet laid over it. Wherever a planet on the moving sheet lines up with something in the photograph, astrologers speak of a transit. There are two kinds.

• A transit to a planet or point. A moving planet forms an aspect, a meaningful angle, to something in your birth chart: a conjunction (0 degrees), a sextile (60), a square (90), a trine (120) or an opposition (180). "Saturn square my Moon" means that Saturn in the sky stands 90 degrees from where the Moon stood when you were born.
• A transit through a house. Houses are the twelve sections of a chart, each linked to an area of life, and they depend on your birth time. "Jupiter in my tenth house" means that Jupiter is passing through the part of your chart linked with career and public role.

Fast and slow planets: how long a transit lasts

What separates one transit from another is, above all, its length.

The Sun moves about one degree per day and leaves any point of your chart behind within a day or two. A slow planet stays near one degree for months.

Retrograde motion stretches this further. For several months of every year, each slow planet appears to move backward, seen from Earth. No planet really reverses: it is an effect of watching one moving planet from another. A slow planet therefore often crosses the same degree three times, and Saturn often takes about nine months for that. This is why astrologers describe slow transits as periods and not as dates.

Why slow transits are read for the longer themes

Time. A Moon transit is over before you have finished noticing it. A Saturn transit lasts long enough to think something through and act on it.

Rarity. The Moon comes back to every point of your chart about every 27.3 days, the Sun once a year. Saturn returns to the same place only about every 29.5 years, Uranus after 84. Neptune needs about 165 years and Pluto about 248, so neither completes a circle within one human life. Whatever Pluto passes over in your chart, it passes in one period of your life only.

So the slow planets are read as the themes of a year or a stage of life, the fast ones as the days on which such a theme becomes noticeable.

A transit does not say what will happen. It names a theme, and how long that theme stays.

The best-known transits are the returns: a planet coming back to its own birth position. Your birthday is one, because the Sun returns to its birth place once a year. The Jupiter return follows about every twelve years, the Saturn return at about age 29.

Where the slow planets are from 2026 to 2028

These positions are the same for everyone. The dates are given in Universal Time and can shift by one day depending on where you live.

What differs from person to person is where these signs fall in the chart. Take Saturn in Aries. If your Sun is in Aries, Saturn passes over it at some point in that span, which is a conjunction. If your Sun is in Libra, Saturn stands opposite it. And for one person Aries covers the fourth house, home and roots, for another the tenth, career. What the twelve houses mean

That is the whole logic of transits: one sky, read against many different charts.

How to read a transit without turning it into a forecast

Three questions are enough for a first reading.

1. Which planet is moving, and what does it touch? Jupiter is read as growth, Saturn as structure and responsibility, Uranus as change, Neptune as imagination, Pluto as slow renewal. In your chart, the Sun stands for your sense of self, the Moon for your feelings and needs.
2. By which aspect? Trines and sextiles are read as support, squares and oppositions as friction that asks for a decision, the conjunction as emphasis. How aspects are read
3. For how long? Days, months or years. This tells you how much weight to give it.

A transit suggests a question worth asking in that period. It does not give the answer, and it is no basis for medical, legal or financial decisions.

What to do next with your own chart

1. Get your birth chart and note the sign and degree of your Sun and your Moon.
2. Compare them with the table of slow planets. Is one of those planets in the same sign, the opposite sign, or three signs away?
3. If so, name the theme in one sentence and ask where in your life it applies.

For a whole year at once, the 2027 Year Ahead Reading compares the moving sky of 2027 with your birth chart, month by month, calculated from your exact birth data.