Solar Arc Directions
Solar Arc directions take a single number — the Sun’s motion in the day after your birth — and apply it to every planet, angle and point in your chart, once per year of life. Mars moves with the same arc as the Sun. So does the Midheaven, the Ascendant, Saturn, the Nodes. The result is a chart-wide forward step, slow but unstoppable, where major life hinges show up as exact aspects to natal degrees.
How the arc is calculated
We compute the secondary-progressed Sun for the date you ask about, then take the difference between that progressed Sun and the natal Sun. That difference is the Solar Arc — usually fifty-something arcminutes per year of life. We add it to every natal placement to produce the directed chart. Unlike progressions, where each planet moves at its own slow rate, here every body steps forward in lockstep.
Why it lands so hard
Because every directed point moves at the same speed, slow planets that barely shift in progressions become active. Solar Arc Saturn can perfect a square to the natal Sun in a year that, by transit and progression alone, would look quiet. People often look back at a Solar Arc hit and say "that was the year everything changed". The technique is famous for catching the structural turns.
How to read it
Look only at exact and near-exact aspects — within a one-degree orb, sometimes thirty arcminutes. A Solar Arc aspect is in effect for roughly one year either side of perfection. Note which directed planet meets which natal point and which house both occupy. The directed planet is the active force; the natal point is the room being entered. Read it as a structural change rather than a passing mood.
Where it sits next to other tools
Solar Arc, secondary progressions and transits are the three timing voices that the Western tradition has refined the most. Transits give days and weeks. Progressions give the slow inner ripening. Solar Arc gives the few-times-a-decade hinge. When all three converge on the same natal point, that is the year a chapter ends and another opens. We compute all three independently — pair them by hand.
Frequently Asked Questions
What orb should I use?
One degree is the upper limit. Many astrologers tighten to thirty arcminutes for a definitive reading. Outside one degree the directed planet is more flavour than event. Our table marks the exact-degree window so you can see the year of perfection at a glance.
Solar Arc vs progressions — which to look at?
Both, for different scales. Progressed Moon names the two-to-three-year emotional chapter. Solar Arc names the single hinge of a year. They are complementary tools, not rivals — the progression is the interior, the direction is the structural shift.
Does the natal chart still matter?
Always. Solar Arc only describes which natal point is being engaged this year. The meaning of that point — its sign, house, dignity, aspects — is set by the natal chart. Without the natal reading underneath, a Solar Arc table is just dots on a page.
Is this Hellenistic?
No. Solar Arc directions in their modern form were systematised by Naibod and refined in the twentieth century by Ebertin and the Hamburg School. Hellenistic timing uses profections, releasing and primary directions. Different roots, different feel — both are on this site.