The meeting was booked for half an hour and it has run past one already. One of them has been talking since the start: explains the idea, backs up a step, explains it again another way, asks for an opinion and answers their own question. The other nods along, glances at the clock in the corner of the screen and, when they finally get a word in, says «sure, let's go with that». They thought something else and kept it to themselves. Agreeing was the fastest way out of there.

A week later, the project is moving in the direction the first one proposed, and the second one delivers with the reluctance of someone who was never convinced. The first one concludes that the colleague is passive. The second one concludes that the colleague does not listen. Both describe exactly what they saw, and both get the reason wrong.

Every work pair has a scene like this. A boss and a right hand, the creative duo who share the same brief, two colleagues who handle the same client. Some pairs achieve twice what each would alone; others spend half their energy managing the friction. What sets one pair apart from another almost always lies in how the two meet.

One person's birth chart shows how they work. Put two charts side by side and something else appears: how those two ways of working fit together, where one completes the other and where they both step on the same foot. The technique for this is called synastry, and it serves work just as much as it serves love.

I start with the limit because, when it comes to work, it protects someone who is not reading this text: your colleague.

A pair reading has no part in any hiring, promotion or dismissal decision. It does not say whether two people are compatible to work together, it gives no score to the partnership and it does not point at who should leave the project. Choosing or ruling someone out by their date of birth is discrimination with friendlier wording, and in many places it is also illegal.

Nor should you get your colleague's chart done without them knowing. Date, time and city of birth are personal data, and reading how someone works behind their back is like reading their diary. The right way is the simplest one: tell them what you want to do, ask for their details and show them the result. If the person says no, the answer is no, and they do not owe you an explanation.

And the reading does not measure anyone's competence, intelligence or character. If you want to know whether someone delivers, look at what they deliver. What two charts describe is the dynamic between two people who already work together and want to work better, and that is all it is for.

Go back to the meeting from the start. Someone who talks a lot usually thinks by talking: the idea only comes together mid-sentence, which is why the sentence needs to exist. Someone who agrees just to end things quickly usually thinks before speaking, and in a conversation where their turn never comes, thinking first turns into being left out.

Mercury is the piece of the chart that describes this: how someone processes information, at what speed, how much context they need, whether they understand better by listening, reading or drawing. In a pair, what matters is how the two Mercurys look at each other. A Mercury in a fire sign next to one in an earth sign is often the person who decides in the heat of the conversation sitting beside the one who only decides after seeing the spreadsheet.

The reading also crosses one person's Mercury with the other's Sun and Moon, and this explains a common complaint: «I speak and she takes it personally». When the way one person speaks touches the other's Moon, which is the part that feels before it thinks, a technical remark lands as a criticism of the person. Neither one did anything wrong. They are simply speaking on different frequencies.

And there is the house in which one person's planets fall in the other's chart. When one person's Mercury falls in the other's house 3, which is the house of everyday conversation, the exchange tends to flow: one speaks and the other understands what they meant. When it falls in a house distant from the subject, the conversation needs translating, and translation can be arranged. One sends it in writing, the other replies the next day, and the one-hour meeting turns into a one-page document.

Every pair has someone who speeds up and someone who brakes, and whoever is in charge on the org chart is not always the one who pulls. There are bosses who hold back and right hands who drag the project forward. What the reading looks at is how each one exercises authority and how each one responds to it.

There are four pieces. The Sun is each person's will, what each one wants to see happen. Mars is the drive and the speed of execution. Saturn is the relationship with rules, deadlines and hierarchy. The Midheaven is the image each one has at work, the place they speak from when they speak as a professional.

When one person's Mars makes a tense aspect to the other's Saturn, the scene so many pairs know shows up: one suggests moving fast, the other asks for one more day, the first hears «no» and the second hears «you don't think things through». When one person's Sun falls near the other's Midheaven, it is common for one to see the other as a reference point, someone whose approval matters. In a mentoring relationship this helps a lot. Between colleagues at the same level it can weigh things down, because one starts expecting an approval nobody asked to give.

A detail of method makes a difference here. If whoever requests the reading does not say who leads whom, it is written in both directions: what each one tends to do when leading, and how each one reacts when being led. Nobody is called a leader on a guess, and each side recognises themselves in their own role.

One of the oldest office fights is about the desk: one is a pile, the other has every pen in its place. The pile is only the symptom. What is at stake is method, and method is read through Saturn, through house 6, which is the house of routine and repeated work, and through Mercury again.

There are pairs where both like lists, interim deadlines, checking before delivering, and they run like clockwork until the day they need to improvise. There are pairs where both work on impulse and deliver brilliant things two days late. And there are the mixed ones, the most productive and the most irritating: a person who opens ten fronts next to another who closes each one of them.

Venus and Mars come in here too, and it is worth noting that, in a work reading, both lose their romantic meaning. Venus is each person's sense of harmony, their taste for the environment, their way of being diplomatic. Mars is the way of disagreeing. Some disagree on the spot, out loud, and forget it by lunch; some disagree inwardly and take three weeks to say so. Putting the two together without knowing this is booking a fight with a date already set.

House 11, which speaks of group and community, completes the picture. It shows how much each one feels part of a team and how much each one prefers working alone, behind a closed door with headphones on. A pair where one lives for meetings and the other delivers best alone needs to sort this out early, before the schedule decides it for them.

No pair lives without friction, and the reading never promises otherwise. What it does is say where it tends to show up, with enough notice for it to become something agreed rather than a crisis.

The most common sources lie in the tense aspects between the two charts: the square and the opposition linking one person's Mars, Saturn and Pluto to the other's personal planets. Mars against Mars is usually a dispute over speed. One person's Saturn weighing on the other's Sun tends to turn into one who feels watched next to another who feels responsible for everything. Pluto, when it enters, brings the question nobody asks out loud: who is in control of this project?

One rule protects the reading from itself: no single aspect is read on its own. An isolated square between two charts full of affinity is a localised friction, and the same tension repeated through three different paths is a theme of the relationship. The reading only calls something a central trait when it shows up through more than one indicator.

Knowing this changes the tone of the conversation. Instead of «you always steamroll me», you can say «we have this point between us; how do we decide when one wants to move fast and the other wants to wait?». It is less dramatic and it settles more. Many a pair discovers they had been fighting over the same thing for years, in different clothes.

There is a chart reading for understanding an employee, described in the text about astrology at work. It looks at one person: how they think, decide, take feedback. It serves whoever manages someone and wants to understand that person.

The pair reading looks at the meeting point. Two calm people can form a stalled pair. Two intense people can form a pair that spurs each other on or one that wears itself down, depending on where one's planets fall in the other's chart. The same professional performs one way with one partner and another way with a different one, and there is no seeing that without both charts on the table.

The technique is the same one used in romantic synastry: crossing two charts point by point. What changes is the question. In love the question is how two people draw close; at work, it is how they split tasks, decide together and disagree without damaging the partnership.

And there is the most useful part of all, complementarity: what one does well and the other does not. Who clears the path and who closes the door, who presents to the client and who reviews the contract, who has the idea at eleven at night and who turns it into a schedule the next morning. Pairs who see this stop fighting over the same chair and start splitting the work in both their favour.

Before any chart, you can start with paper. Take the last three times you and your work partner did not see eye to eye. For each one, write on one line what you wanted and on another what you think they wanted.

Now look at all three together. If the mismatch was always about speed, the subject is Mars. If it was about who decides, it is the Sun and Saturn. If it was about something one said and the other understood differently, it is Mercury. In most pairs, the three fights are the same fight.

Then, and only if the other person agrees, show them your list and ask them to make their own. The conversation that follows is often the first in months where both talk about how they work, and leave the work itself for later.

And if the meeting at the start of this text sounded like yours, try a rule for the next one: whoever talks the most writes the proposal on half a page, and whoever agrees quickly gets a day to reply in writing. A week is usually enough for both to notice they agreed on more than they thought, and disagreed exactly where it mattered.

And the questions that come up most on this subject, with the short answer: