The right angle and the seven degree orb
A square is a quarter of the circle. The orb used here is seven degrees, so the Sun and Uranus count as square anywhere between eighty three and ninety seven degrees apart. There are two squares each year, one on each side of Uranus, and the Sun crosses each fourteen degree band in about a fortnight.
Add them up and roughly seven or eight births in a hundred carry the aspect. As with every Sun to outer planet contact, everyone born in those windows shares it, and Uranus keeps the same sign for about seven years, so the sign pair belongs to a year group rather than to you.
Why squares are read as productive
The Sun is deliberate purpose. Uranus is interruption, the correction that arrives without warning, the intolerance of an arrangement that has stopped being true. A square puts them at an angle where neither can absorb the other and neither can look away, which the tradition reads as pressure that has to be discharged into action.
The usual description is a person who breaks their own arrangements, changes course at the point where things were about to settle, and has difficulty with authority in a specific way: not defiance for its own sake, but an inability to accept a rule whose reason has stopped applying. The same structure is what the tradition credits with genuine originality, on the argument that the friction keeps producing attempts.
Nothing about that is a verdict. A square describes where a chart does work, and squares to Uranus tend to describe work done in bursts. Long flat stretches, then a decision that looks abrupt from outside and was not abrupt at all from inside. The tradition treats that rhythm as the aspect functioning normally rather than as instability.
Mode, house and the personal layer
Squares usually join signs of the same mode, and the mode sets the texture. Cardinal squares tend to read as starting things and abandoning them. Fixed squares as long stretches of resistance followed by an abrupt break. Mutable squares as constant small revisions rather than one large one.
The houses are where it becomes yours. A Sun in the tenth squaring Uranus in the seventh points the friction at career and partnership. The same square between the first and fourth points it at family and self-definition. That layer needs a birth time, because the houses turn a degree every four minutes and a rounded hour can move the whole configuration. If your time came from memory rather than a record, hold the house reading loosely.
Orb, timing and what not to inflate
Inside a degree or two this is one of the loudest features a chart can have and most people recognise the description without prompting. Between two and four it is a real theme. Beyond five it fades, and a seven degree Sun square Uranus in a chart where nothing else touches Uranus is background rather than a defining feature.
Uranus is retrograde for around five months of every year, so a natal retrograde Uranus is ordinary and does not intensify the square. What does matter is repetition: another planet on the same degrees, or a second contact to Uranus, will make the theme far more visible than a tight orb alone.
The widget above reports the exact separation, so the decision about how much weight to give this aspect can be made from a number rather than a mood.
Questions people ask about this
Is Sun square Uranus a difficult aspect?
The tradition reads squares as friction rather than misfortune. This one describes pressure between a settled direction and the impulse to change it, which is uncomfortable and also the reason the aspect is credited with originality.
How often does Sun square Uranus occur?
Two squares form each year, one on each side of Uranus, and the Sun takes about a fortnight to cross each seven degree band. That works out at roughly seven or eight per cent of births.
Does it explain problems with authority?
Partly, and the description is narrower than the cliche. The reading is not blanket defiance but difficulty accepting a rule once its reason has expired. Whether that shows up at all depends on the houses and on the rest of the chart.
Does a retrograde Uranus make the square stronger?
No. Uranus is retrograde for close to five months a year, so it is the ordinary condition rather than an intensifier. Look at orb and at repeated contacts instead.
What is the difference between this and Sun opposite Uranus?
The opposition places the two across the chart where each can see the other, which usually reads as dialogue. The square places them at an angle where neither can, which is why it is described as pressure that discharges into action.
How much does the birth time change?
The signs are shared with everyone born that year, so the houses carry the personal detail. Houses move about a degree every four minutes, so an approximate time can shift the whole configuration and should be treated with caution.