Aspects in the birth chart
Sun–Mercury aspects
Mercury never strays far from the Sun — astronomically it can only get about 28 degrees away. So nearly everyone has a contact here, and the question is not whether but how close. The theme is how near your thinking sits to your sense of self: is criticism of your opinion the same as criticism of you? People with these two tightly linked think fast and speak as they are — but easily confuse "I changed my mind" with "I was wrong".
Do you have one of these aspects?
Enter your birth details — we use the Swiss Ephemeris to work out which angle actually stands between Sun and Mercury in your chart.
Whether this aspect is in your chart depends on your date, time and place. Three answers and you know.
Your birth data
When were you born?
The date sets the Sun, Moon and every planet.
Sun Conjunction Mercury
Fusion — the two act as a single force.
With Sun conjunct Mercury, your core self and how you think and speak can no longer be separated. You experience both as one movement — what you want and how you do it arise in the same impulse. Powerful, but hard to put into perspective.
In a conjunction both factors sit at the same point of your chart. You cannot experience them separately: what one wants automatically colours the other. That makes this the strongest of all connections — neither "good" nor "difficult", simply intense. People with a tight conjunction experience the theme as part of their personality rather than as something that happens to them. The cost: you rarely see it from the outside, because it is as self-evident to you as your own voice.
Combine two planets.
Pick two factors and an angle — you get the meaning straight away, explained in one line.
Sun Square Mercury
Open the pair page for the full reading of this combination.
Sun and Mercury: the five angles in numbers
Between Sun (your core self) and Mercury (how you think and speak) the calculator checks five angles. Each has its own leeway; for these two the date of birth is enough.
| Aspect | Angle | Orb | Character |
|---|---|---|---|
| Sun Conjunction Mercury | 0° | ± 8° | fusing — depends on the planets |
| Sun Sextile Mercury | 60° | ± 5° | flowing, harmonious |
| Sun Square Mercury | 90° | ± 7° | tense, demanding |
| Sun Trine Mercury | 120° | ± 7° | flowing, harmonious |
| Sun Opposition Mercury | 180° | ± 8° | tense, demanding |
- Use the calculator above to find which of the five angles you have.
- Then read only that section — and test it on a situation from this week.
- No hit? Then Sun and Mercury work independently for you.
Related pairs: Sun–Moon aspects, Sun–Venus aspects, Sun–Mars aspects. All aspects of your chart at once are in the aspects calculator, the life areas in the house calculator, and today’s angles to your chart in your personalized daily horoscope.
How often are Sun and Mercury in aspect?
23.5 % of everyone born 1940 to 2010 has one of the five major aspects between Sun and Mercury; 76.5 % have none. Opposition, square, trine and sextile did not occur at all in these years.
Seen from Earth, Mercury always stays near the Sun, because its orbit lies inside ours. It never gets more than 28° away, so the conjunction is the only aspect the two can form. The others never occur.
In the sky the two form 6.3 exact major aspects a year on average.
| Aspect | Share of births |
|---|---|
| Conjunction | 23.5 % · 6.3× a year exact |
| Opposition | 0 % · 0× exact 1900–2100 |
| Square | 0 % · 0× exact 1900–2100 |
| Trine | 0 % · 0× exact 1900–2100 |
| Sextile | 0 % · 0× exact 1900–2100 |
| No major aspect | 76.5 % |
| Famous people with one of them | 448 / 2,219 |
Counted with the Swiss Ephemeris: 25,933 birth charts, one for every day from 1940 to 2010 at 12:00 UT, orbs as in the calculator. Sky: every day 1900–2100. Famous people: Wikidata, only where the aspect holds for the whole birth day.