Mercury Conjunction Mars Synastry: When How One of You Talks Sits Right Beside What Drives the Other

Every birth chart has a Mercury and a Mars, and they do different jobs. Mercury is how you think and talk: what you notice, how you explain, ask and joke, how quickly you pick things up, and the small daily trade of messages and questions. Mars is what drives you: your energy, your effort, your initiative, what you go after and how soon. In this contact, one person's Mercury is within a few degrees of the other person's Mars, so the two sit almost at the same point on the zodiac.

The geometry is short. A conjunction usually puts both planets in the same sign, so they share an element and a mode (the twelve signs fall into three modes by how they move: cardinal signs start things, fixed signs keep them going, mutable signs adapt as they go). The reading built on it is fusion or mirroring: the way one of you puts things and the way the other gets going tend to run on the same pattern, so there may be little to translate between a sentence and a start.

What that can feel like is a conversation with a bit of motion in it. A suggestion from one of you may be picked up as a plan, and a plan from the other may be heard as a point worth making. Neither of you tends to wait long for the other to arrive at the same place.

It can appear between friends, siblings, colleagues, neighbours, or a parent and their child as readily as between partners, and it is one contact among many in any two charts.

In this contact one of you brings Mercury and the other brings Mars, and the two sit close together. Call them the Mercury person and the Mars person.

If you are the Mercury person, you are mostly just thinking aloud, explaining, asking, working out what to say. Around the Mars person your words may be taken up fast. A half-formed idea can come back as something already under way, and saying a thing aloud near them tends to set it moving. You may enjoy that, or occasionally feel that the thought moved on before you had finished with it.

If you are the Mars person, you are mostly just going at what you are going at: the job, the project, the next step. Around the Mercury person your drive often has words to go with it. They may put a name to what you were about to do, or ask the question that makes the next step clear. You may find your effort easier to explain, and sometimes that the talk has run slightly ahead of the doing.

If the link also runs the other way, from the Mars person's Mercury to the Mercury person's Mars, each of you is both. Then each of you is, at different moments, the one who says it and the one who starts it.

Put simply, the Mercury person tends to say it and the Mars person tends to start it. Because the two sit so close, the saying and the starting may come out almost together.

The Mercury person often gives the Mars person language for what they are doing: a plan in plain sentences, a question that narrows the choice, a joke that takes the weight off a task. The Mars person often gives the Mercury person traction: a reason to finish the sentence, a direction for an idea that has been circling, a go-ahead that arrives while the thought is still fresh.

What each may want is for the other to keep pace without being hurried. The Mercury person may want a chance to say the whole thing before it is acted on. The Mars person may want a point reached without the talk going round it twice. Both are modest wants, and in a conjunction each may be met quickly, because the other is nearby and moving at the same speed.

Day to day it can show in short exchanges that do a lot: a text answered with a done thing, a question answered by someone already looking it up.

These are sketches, not reports: illustrations of how the contact might show up across different kinds of pairs.

• Flatmates. A letter arrives about renewing the parking permit. One flatmate starts reading the form aloud; the other has the pen out before the second question. The form is filled in while the kettle is still heating.
• Parent and child. A child says, to nobody in particular, that they would like to make a kite. Their parent is already hunting for string in a drawer, and the sentence about what kind of kite is finished while they look.
• Colleagues. One colleague says the figures ought to go out today. The other has the document open and has changed the file name before the first has finished the sentence.
• Siblings. Two siblings pack a car for a house move. One calls out the next item, "lamp, then the blue box", and the other has it in their arms before the sentence is finished. Neither has to ask what the other meant.
• Friends. One friend remarks that the swimming pool is bound to have a quiet lane at seven. The other is on the phone to find out before the remark has quite finished.

In each sketch what one person says and what the other does are close enough to feel like one movement.

Because a conjunction usually keeps to one sign, that sign's element tends to shape how the whole contact sounds. In plain terms: fire is enthusiasm and action, earth is practical steadiness, air is talk and ideas, water is feeling.

Fire. Words and moves are both quick and direct. The Mercury person says it in few words, and the Mars person has already started. It might look like two teammates who call a play in three words in a huddle and are running it before the huddle breaks up.

Earth. Words are plain and exact, and effort is steady. The Mercury person gives the measurement, and the Mars person gets on with the job. It might look like two neighbours cutting a hedge: one reads out how much is to come off, and the other is already trimming.

Air. Words are the main event, and effort goes into ideas as much as into tasks. It might look like two colleagues who meet in a corridor, trade a notion and a counter-notion, and part with a new way of running the weekly report.

Water. Words come from mood and memory, and effort follows feeling. It might look like two friends on the phone: one says quietly what a mutual friend seems to need, and the other has a train ticket booked before the call is over.

Moving together is most of what this contact gives, and it can have a quieter side that belongs to this pair of planets.

Because talk and action sit close, words can turn into tasks before they have been weighed. A passing remark may be taken as a plan, and a plan may go ahead before either of you has checked that it was one.

Because the pace is shared, brisk talk can be mistaken for agreement. Two people moving quickly in one direction do not always notice that a third option was available.

And when both of you are used to a quick reply, a pause can feel like a stop. A moment of quiet may be the other's thinking time, not a refusal.

This is what this kind of closeness can be like to live with: quick, and sometimes ahead of what either of you meant to say.

The older sources used here say nothing about a Mercury and a Mars in the same place. The only passages in them that name Mercury together with Mars are William Lilly's (*Christian Astrology*, 1647, Book III, p. 638) and James Wilson's (*A Complete Dictionary of Astrology*, 1819, p. 381). Both are about the opposition, and neither says anything about the conjunction, so nothing from them is used here.

The conjunction reading on this page, that a Mercury and a Mars close together read as fusion or mirroring because they usually share a sign, an element and a mode, is based on the kind of sign a conjunction usually joins. It is an editorial reading, not something the older books say about Mercury and Mars. The same goes for everything else on this page: who the Mercury person and the Mars person are, what each gives and may want, the element variations and the sketches, which are illustrations.

• One of you often says the thing, and the other often has it started before the sentence is finished.
• A plan has come together between you in a single short exchange more than once.
• A question from one of you may usually be answered by the other doing something.
• When one of you slows to think, the other may take it for a stop.
• Now and then something is under way before either of you is sure it was decided.