Western · Blog
How Astrological Transits Work: When Planets Move Across Your Chart
Deep Oracle Editorial Team · 2026-06-06 · 5 min read
A transit is simply where the planets are now, measured against where they were when you were born. Your natal chart never changes. The sky keeps moving. When a moving planet reaches an angle to one of your natal planets, that is a transit.
This is the mechanism behind almost all astrological timing. It is also the part most easily overstated, so this page tries to be specific about what transits can and cannot tell you.
What actually makes a transit
Three things, and all three matter:
Which planet is moving. A transiting Moon and a transiting Pluto are not comparable events. Speed determines duration, and duration determines significance.
What it touches. A transit to your Sun, Moon, Ascendant or chart ruler is a different order of event from one to a minor point. Transits to the angles are the ones people notice.
Which house it is crossing. The same transiting planet reads differently in your 2nd house than in your 10th. Houses supply the where; see the twelve houses.
Fast planets versus slow planets
This distinction does more work than any other in transit reading.
| Planet | Rough time in a sign | What its transit is like |
|---|---|---|
| Moon | 2–3 days | Mood, daily texture. Too fast to plan around |
| Mercury | ~3 weeks | Conversations, paperwork, decisions |
| Venus | ~4 weeks | Social and financial tone |
| Sun | ~1 month | The month's emphasis |
| Mars | ~6–7 weeks | Energy, friction, drive |
| Jupiter | ~1 year | Growth, opportunity, expansion |
| Saturn | ~2.5 years | Structure, limitation, consolidation |
| Uranus | ~7 years | Disruption, sudden change |
| Neptune | ~14 years | Dissolution, ambiguity, idealisation |
| Pluto | 12–20 years | Deep, non-optional restructuring |
The rule that follows: fast transits describe texture, slow transits describe periods. If you are trying to understand a year that felt fundamentally different, look at the outer planets. If you are trying to explain a single odd day, the outer planets are not where the answer is.
Orbs — how close counts
A transit does not switch on at exact contact. It builds, peaks, and fades.
- Applying — the transiting planet is approaching exactness. This is usually when the effect is felt building.
- Exact — the peak.
- Separating — moving away. The event is usually understood in this phase rather than felt.
Common working orbs are about 1° for the fastest bodies and up to 3–5° for the outer planets, though practitioners differ and there is no agreed standard. A wider orb is not more informative; it just makes a transit harder to falsify.
Retrogrades make the window longer, not different
When a slow planet turns retrograde it can cross the same natal degree three times — direct, retrograde, then direct again — over many months.
That is why a Saturn or Pluto transit is not an event but a season. The first pass raises the issue, the retrograde pass reworks it, and the third pass settles it. People frequently report that the middle stretch is the hardest and the final pass is when it resolves.
If you have ever had a year where the same problem kept returning in slightly different form, this is often the mechanism.
What each planet's transit tends to do
- Jupiter — expands whatever it touches. Opportunity, confidence, sometimes excess. Generally welcome, and not a guarantee of anything.
- Saturn — tests and consolidates. Work, limits, responsibility, the removal of what is not structurally sound. Difficult and usually productive in retrospect.
- Uranus — disrupts. Sudden changes, restlessness, the breaking of arrangements that had become too fixed.
- Neptune — dissolves and idealises. Boundaries blur, certainty drops, inspiration and confusion arrive together.
- Pluto — restructures at depth. Slow, non-optional, and usually only legible after it has finished.
- Mars — energises and irritates. Short, sharp, and useful for timing action.
- The Saturn return, around ages 29 and 58, is the most widely known example of a transit — Saturn arriving back where it was at birth. See Saturn return for that one specifically.
How to read your own transits
- You need your natal chart, with an accurate birth time if you want house transits or transits to the angles.
- List your natal positions — planets, Ascendant, Midheaven, by sign and degree.
- Find where the slow planets are now — Jupiter through Pluto. An ephemeris or any transit calculator gives this.
- Look for contacts within orb, starting with the outer planets against your Sun, Moon and angles.
- Note which house each transiting planet is currently in.
- Check for retrogrades — if the planet will station and return, you are in a multi-pass window rather than a single event.
What transits do not do
They do not determine events. A transit describes a kind of pressure or opportunity, not a specific outcome, and the same Saturn transit correlates with people leaving jobs, committing to jobs, and staying put and finding it hard.
Nor is there evidence that transits predict events. What they offer is a framework for thinking about a period — and much of their practical value is retrospective, in giving a shape to something already lived through. That is a genuine use and it is a smaller claim than the one usually made.
Beware, in particular, of any transit reading confident enough to name what will happen and when. The technique does not support it.
Related
The twelve houses frame every transit. Synastry compares two natal charts rather than a chart against the current sky — a different technique that is frequently confused with this one.
Deep Oracle does not publish a Western chart calculator; you will need your chart cast elsewhere. We do publish the placements library and the Western astrology blog.
(This is an interpretive framework — not advice.)