The almanac
Any two, side by side.
The signs themselves, without names attached, and how each pair weathers the other.
Famous quarrels
Famous kindred
Nothing between you is automatic, so everything between you is chosen. Built love outlasts found love; pack patience.
A double star · 56 gravity
A shared center of mass: the orbit holds while both stars keep their appointments.
Lava and bedrock. One moves mountains; the other is the mountain.
Capricorn × Sagittarius · spark and sail
The myth calls this the dreamer and the killjoy. Look closer: every cathedral needed both the architect who saw it and the masons who believed the stone.
One of you wants to leap, the other wants to survey the landing. At its best this is architecture: vision with foundations. At its worst, each experiences the other as an obstacle: the brake and the runaway.
Spark and sail. One sets direction, the other adjusts trim: agile, fast, surprisingly durable. Just check that the mutable one's yeses are real, not merely easier than the argument.
Neighboring signs: adjacent countries that share a border but not customs. Small translations, often.
Assembling furniture. One of you has read the instructions; one of you is already holding the drill. The shelf goes up twice: once fast, once right.
Capricorn brings the long game, kept faithfully, and quietly envies Sagittarius their certainty that somewhere is always worth going. Sagittarius brings the horizon, delivered fresh daily, and envies Capricorn the long patience that actually finishes things.
Trade tempos on purpose: let fire pick the destination sometimes, earth the route. Mark every finished thing loudly.
What would you build if it had to last a century? What would you do if it only had to last a night? Both answer both.