The short answer

Two who don't change, and one of them likes change. By the rule of elements, Taurus is earth and Aquarius is air — and the rule rejects this pair. Keep that in mind and read on, because the rule answers far less than it seems to.

The best thing about this pair is loyalty. Both are fixed signs, and fixed doesn't disappear: once this pair decides the other belongs, it's for life. Aquarius brings new ideas and odd people, Taurus brings dinner and continuity, and there's real pleasure in this for both — Aquarius likes having somewhere to come back to, and Taurus likes being the one person Aquarius truly lets in.

What the element rule says, and what I measured

The table every magazine publishes is simple: fire matches fire and air, earth matches earth and water. It was not invented yesterday, and it has a geometric reason — signs of the same element sit 120 degrees apart, and allied elements sit 60 degrees apart. Those are the trine and the sextile, the two aspects that tradition calls harmonious. The compatibility table is the aspect table applied to a single planet.

It puts half the zodiac on each person's list, which already shows how little information that is. And it can be tested against the numbers. I drew a random sample of 600,000 pairs of birth dates between 1966 and 2025, using the same ephemeris that builds charts on this site, and asked: in the pairs the rule approves, do the other pieces follow along?

The columns are the same. Knowing that the rule approves or fails your pair tells you nothing about the other person's Moon, nothing about desire, and nothing about how many contacts the two charts have. And 50.0% is exactly what a coin toss would give you.

That does not make the table false. It makes it small: it describes a trait of temperament, read from a single point on the chart. Using it to decide who to date is reading a book by its title's first letter.

Taurus and Aquarius in practice: where this pair gets stuck

They're 90 degrees apart, and both are fixed: it's the longest standoff in the zodiac. Aquarius defends change in theory and is rigid in practice — he doesn't change his mind, he defends opinions about changing. Taurus doesn't pretend otherwise: he's conservative and admits it. So the argument is never about the actual subject, it's about the principle, and both dig in. Taurus feels Aquarius treats the house like a debate club; Aquarius feels Taurus treats any new idea like a threat.

What gives this pair its ground is the rest of the chart, more so than in any other pair. A mutable Moon in either of them is the piece that keeps the standoff from becoming routine, because it puts someone in the house who can change position without feeling they've lost.

What usually unblocks things: trading argument for experience. Aquarius persuades through argument, and Taurus isn't persuaded by argument at all — he's persuaded by what he's tried and liked. Proposing the thing instead of defending it solves more in one weekend than a year of arguing. And Aquarius does well to say the affectionate word every now and then, even if it feels redundant: Taurus doesn't infer a bond from consistency, he needs the actual sentence and the actual gesture.

What the element table doesn't look at in this pair

The element rule reads one thing only: the element. Each sign carries two other labels the table ignores, and in both cases they say more about the day-to-day than the element does. The modality — cardinal, fixed or mutable — is the way a person goes into a subject: cardinal starts it, fixed holds it, mutable changes it. And the ruler is the planet that gives the sign its vocabulary.

Taurus is fixed and ruled by Venus; Aquarius is fixed and ruled by Saturn.

Both are fixed and they're in square, which is the hardest combination there is: the modality that gives no ground on the angle that grinds the most. Don't expect this pair to settle a disagreement through argument — what settles it is time, or something from outside, or the decision to leave that subject alone for good. Couples of this pair who last usually keep an unspoken list of topics they don't touch.

Venus and Saturn, again, and here Saturn shows up in his distant version rather than his stern one. Aquarius organises life around principle, and affection comes into the accounting after the principle. Taurus organises around the body: who's near, who cooks, who sleeps there. So Aquarius can be entirely loyal and seem absent, and Taurus can be there the whole time and seem to have understood nothing of what the other thinks.

The one thing your sun sign decides about the other person

There is one exception to "the table tells you nothing", and it comes down to pure geometry. Venus never moves more than 47.2 degrees from the Sun — it is an inner planet, and from Earth's point of view it stays tied to the Sun's light. Given your sun sign, your Venus can only fall in five signs.

So the distance between two sun signs decides the odds that both Venuses land in the same sign. Measured across the same 600,000 pairs:

Taurus and Aquarius are 90° apart from each other — square — and that puts this pair in the 5.5% bracket. The two of you may well have Venus in the same sign, and it is the one affinity your sun sign guarantees, at least a little.

Notice what the table does with the element rule: it cannot follows the rule. Pairs the rule fails come out on top of the list, and pairs it approves come out at the bottom. The Venus link is real, and it is geometric — and it is why the compatibility table sometimes seems to work. It works a little, and not for the reason it claims to.

What no sign table can reach

Four pieces that change everything, and that no sun-sign table can reach:

• Each person's Moon. It is the way you feel, need and settle down — the piece that most decides day-to-day life together. It changes sign every two and a half days.
• The Ascendant. It changes every two hours and depends on the city. Two people born on the same day, both Taurus, can arrive at a party in opposite ways.
• The house each one falls into on the other's chart. The same Venus in your house 5 and your house 12 is passion in one case and a private matter in the other. This layer needs both people's birth time.
• What each one has already lived. Age, past relationships and the timing of the meeting weigh more than any aspect — and none of it is in anyone's chart.

This crossing is what's called synastry, and it needs both people's date, time and city of birth. Comparing sun signs is what's left when you don't have that.

And the limit stated out loud still holds: astrology decides nothing for anyone, doesn't tell you to stay or leave, and doesn't replace conversation or therapy. It gives you vocabulary. A couple who discover that one Moon needs routine and the other needs novelty have gained a better question than they had before.

Frequently asked questions about Taurus and Aquarius