Impossible aspects

Some aspects can never form: it's not a quirk of your chart, it's celestial mechanics. Mercury never strays more than 28° from the Sun, Venus more than 47°: seen from Earth, they stay glued to it and so can't meet it in a square, a trine or an opposition. Understanding these impossibilities is understanding why the Sun, Mercury and Venus always form a tight trio in a birth chart. Pair by pair, we explain which aspect is ruled out, and why.