The Outer Planets in Transit

The outer planets — Uranus, Neptune, Pluto — move so slowly that when they transit a point in your chart, they stay for months to years, not days. These are the transits that mark the turning points of a life: the ones people describe afterward as "the year everything changed" or "when I became someone else."

Because they are rare and slow, they are also predictable. You can see them coming years in advance, which makes them the most useful transits for understanding both where you have been and what is ahead.

The outer planets are modern — none were known before 1781 — so there is no ancient tradition of transiting them specifically. But the principle is old: the slower the body, the more significant its motion. The tradition applied this to Saturn, the slowest visible planet. The moderns extended the same logic outward, and it holds. A Pluto transit is to a Saturn transit what a Saturn transit is to a Mercury one — an order of magnitude slower, rarer, and heavier.

Each outer planet also produces its own generational transit to itself, on a fixed schedule, and these have become the recognised landmarks of the modern life course.

Uranus — the break-in. Sudden, liberating, disruptive. A Uranus transit to a personal planet is where the unexpected arrives and something long-suppressed demands its freedom. The great scheduled one is the Uranus opposition around age 40–42 — the astrological substance of the midlife crisis, when what was set aside for the sake of structure returns to be reckoned with.

Neptune — the dissolving. Slow, foggy, hard to read while it is happening — that unclarity is the transit. Neptune to a personal planet dissolves boundaries: it can be spiritual opening, artistic flowering, longing, confusion, or loss, and often several at once. Do not expect to understand a Neptune transit until roughly two years after it ends.

Pluto — the taking-down. The slowest and most thorough. A Pluto transit does not adjust something; it takes it apart and returns it changed. These are the transits people describe as death and rebirth, and they are not exaggerating. Pluto to the Sun, Moon, or an angle is among the most transformative passages a chart can receive.

The rule of proportion: when you look at a period of life, the outer-planet transits are the headline. Everything else — the Saturn transits, the Jupiter years, the fast-planet weather — is written underneath them.

On the Planets page, scrub the date forward and watch where Uranus, Neptune, and Pluto are heading relative to your natal placements. An outer planet approaching an exact aspect to your Sun, Moon, Ascendant, or Midheaven within the next few years is the most significant timing information your chart holds.

Then look backward. Find a year you know changed you, and check what the outer planets were doing to your chart then. This is how you learn to trust the technique — it explains the past before you ask it to hint at the future.

Transiting Uranus opposite natal Pluto (0.5°) and transiting Pluto square natal Pluto (0.8°), in the same period.

Two outer-planet transits to Pluto at once — one a break-in, one a taking-down — both within a degree, both to the planet of the underworld itself. This is an extraordinary concentration: the buried, coiled power of the chart being simultaneously struck by lightning and pressurised from below.

For one person, that period was a Kundalini awakening — the serpent energy rising up the spine, unbidden and unscheduled. Which is exactly what these two transits describe together: Uranus provides the suddenness and the voltage, Pluto provides the depth and the force from underneath. The awakening did not come from nowhere. It came on a schedule written into the chart, at a moment two of the slowest bodies in the sky crossed the chart's most buried point within a degree.

That is the outer planets doing what only they can do: marking the passage where a person becomes someone else.

• Howard Sasportas, The Gods of Change — the definitive book on outer-planet transits.
• Richard Tarnas, Cosmos and Psyche — the outer planets and the shape of a life, at the widest scale.