Square · 90° apart
Square
Same modality, clashing elements. Genuine friction, and genuine momentum: this pairing produces change, not comfort.
Earth · Mutable · ruled by Mercury
Brings. Spots the flaw everyone else missed, and fixes it rather than pointing at it.
Struggles with. Applies the same scrutiny to itself until nothing is ever finished well enough.
In love. Shows love through practical help. Criticism is often affection badly aimed.
Fire · Mutable · ruled by Jupiter
Brings. Genuinely open-minded and hard to discourage. Says the thing nobody else will.
Struggles with. Says it without checking whether it needed saying, and leaves before the consequences land.
In love. Needs room and honesty. Reads possessiveness as a threat rather than devotion.
Virgo is mutable earth; Sagittarius is mutable 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 1.418% of all possible pairings, which ranks 25 of 78.
12 of the 78 pairings form the same square. Worth knowing before treating this aspect as a distinguishing feature of your relationship — a sixth of all couples share it. 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.