Opposition · 180° apart
Opposition
Opposite signs sit across the wheel. Each holds exactly what the other lacks, which makes the pairing either complementary or exhausting.
Air · Fixed · ruled by Uranus (traditionally Saturn)
Brings. Thinks for itself and cares about fairness at a scale beyond its own circle.
Struggles with. Intellectualises feeling, and mistakes emotional distance for objectivity.
In love. Values friendship inside a relationship above romance. Needs autonomy preserved.
Fire · Fixed · ruled by Sun
Brings. Genuinely generous, and lifts the mood of a room by walking into it.
Struggles with. Needs recognition badly enough that its absence reads as rejection.
In love. Romantic and demonstrative. Wants to be admired, not merely tolerated.
Aquarius is fixed air; Leo is fixed fire. Sharing a modality means handling change the same way, which sounds helpful and often means competing for the same role.
Sun signs are one factor among many, and astrology itself treats them as a starting point rather than a verdict. Two full charts describe far more than two birthdays do.
Computed, not asserted
Zodiac signs are not equally common — the Sun spends different amounts of time in each, so some pairings occur far more often than others. This one is 1.403% of all possible pairings, which ranks 28 of 78.
Only 6 of the 78 pairings form a opposition, so this configuration is genuinely uncommon — unlike most things described as rare in compatibility writing. Note also the rising times: at London’s latitude these two signs spend very different amounts of time on the ascendant, which is why one of them turns up as a rising sign far more often than the other. The full table is here.