No sign is better for a given profession, and the question has the wrong address. There are surgeons, teachers and accountants of all twelve signs, and the reason is arithmetic: the solar sign is one twelfth of one piece out of the ten the chart has.

The lists of “ideal professions for each sign” circulate because they are easy to write, not because they describe anything. They take the sign's keyword, Aries is initiative, therefore entrepreneur; Virgo is detail, therefore proofreader, and call that a vocation. It is the sign's adjective with a job title stuck on the front.

What the chart says about work lives in four places, and none of them is the solar sign: the Midheaven, its ruler, and houses 2, 6 and 10. All four demand the hour and the city of birth, which is why no list made from the date alone can say anything about career.

The Midheaven is the highest point the ecliptic reaches in the sky of your birth, and the start of house 10. In Latin it is the Medium Coeli, the middle of the sky, and that is why it shows up abbreviated as MC.

It describes what your life shows to the outside: the reputation, the post, what is left of your work when someone speaks of you without you being there. It is not what the person does from nine to six, that is house 6. It is what all that builds as an image over decades.

The distinction is worth making, because it undoes a common misunderstanding: the Midheaven does not say the profession. It says the manner of appearing. A Midheaven in Capricorn describes someone who builds authority slowly and by structure, and that fits a judge, an architect and a carpenter who signs her own furniture.

What gives a concrete address is the ruler of the Midheaven: the planet that rules the sign sitting there, and the house that planet landed in. Midheaven in Libra takes Venus; if Venus is in house 9, the career organises itself around foreign places, teaching or publishing. The same Midheaven with Venus in house 6 describes a craft done by hand. The whole logic of rulers is in chart ruler and dominant planet.

The Midheaven depends a great deal on the hour and almost nothing on latitude, and that sets it apart from the Ascendant. I calculated the distribution of the twelve signs at both points, with the same house formula this site uses to build charts:

In Belém, each sign gets 7.75% to 8.94% of Midheavens and 7.67% to 8.97% of Ascendants; in São Paulo, 7.75% to 8.94% and 6.34% to 9.45%; and in London, 7.75% to 8.94% and 3.65% to 11.86%.

Notice the Midheaven: the same numbers in all three cities. The Midheaven does not know what latitude you were born at, it depends only on sidereal time and the tilt of the Earth, and that tilt is the same everywhere. The small variation that remains, from 7.75% to 8.94%, comes from the signs near the equinoxes against those near the solstices.

The Ascendant is the opposite. In London, someone born with Scorpio rising is three times as common as someone born with Aries, 11.86% against 3.65%. Your career sign is drawn far more fairly than your appearance sign.

This has a practical consequence worth more than the curiosity: if you are trying to work out your birth hour from its effects, the Midheaven is the piece that gives the least away on its own, it changes every two hours like the Ascendant, but without the unevenness that makes some signs turn up far less than others.

Houses 2, 6 and 10 are three different questions about work, and plenty of people have one good and another hard. Treating them as one thing is what makes someone think “the chart is wrong” when they earn well and hate the job.

House 2 is about what you earn and what you value, and when it is hard, money that slips away and a sense of not deserving show up; house 6 is about the routine, the craft and health at work, and when it is hard, a job that makes you ill and a boss who consumes you show up; and house 10 is about the career as trajectory and image, and when it is hard, recognition that does not arrive and a post that does not fit show up.

House 8 comes in when the money is someone else's: partnership, inheritance, investment, the salary paid by a company that is not yours. It is the difference between earning and receiving, and it explains a lot of partners' quarrels.

Three combinations that come up often, and what each describes:

• Strong house 10 and hard house 2. Recognition that arrives before the money. It is common in prestigious, badly paid careers, and the person takes a while to see that the problem is one of price, not of talent.
• Strong house 2 and hard house 6. Earns well and cannot stand the routine. It tends to be whoever changes jobs while keeping the salary band, and does not understand why the relief never lasts.
• Strong house 6 and empty house 10. Likes what she does and does not want to be seen. It is not a lack of ambition, it is ambition of craft, which is another thing and is hardly ever read as a virtue.

The chart does not say how much you will earn, and no honest reading promises that. How much someone earns depends on country, on decade, on choice and on luck, and none of that is in anyone's sky.

What the chart describes is the relationship with money, and that part is quite concrete: whether it comes from her own work or from partnership, whether it sticks or slips away, whether she spends to calm herself or saves so as not to feel fear, and what she thinks she deserves to receive. The last one changes lives the most, because the price someone charges tends to be what she believes she is worth, and not what the market would pay.

Venus and Jupiter come in here, and they are not what their reputation says. Venus describes what the person values, and Jupiter how much she allows herself. A well-housed Jupiter does not guarantee money; it describes someone who asks for more, and asking for more is half the way there.

The sign does not say what you should do with your life, and neither does astrology as a whole. The chart describes tendencies and affinities, not a profession, and far less an order.

Four things that take apart any list of professions by sign:

• The Midheaven is another sign. A Pisces person with Midheaven in Capricorn appears to the world as someone of structure, and no list of “professions for Pisceans” predicts that.
• The Sun's house changes everything. Sun in house 10 and Sun in house 12, in the same sign, are two opposite relationships with being seen.
• Saturn says where it will cost. And what costs is often where the person becomes good, competence built the hard way lasts longer than easy talent.
• The era you live in. Half of today's professions did not exist when astrology was written. The chart describes a function, not a job title.

And the limit said out loud holds: astrology chooses nobody's career, predicts neither dismissal nor promotion, and does not replace careers advice. It gives vocabulary for a question that is usually badly put, and “which profession suits me?” almost always is.

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