Ketu is the Moon's south node, a shadow planet with no body of its own. It stands for letting go, the past, sudden endings and the turn inward. It moves backward through the zodiac, and Rahu always sits in the opposite sign, reaching for what Ketu releases. Scorpio is a fixed water sign ruled by Mars, and the tradition calls Ketu exalted here: a planet of release and insight in the sign of secrets, crisis and deep change. It sees what others miss.
With Rahu in Taurus, wealth, land and pleasure are what the world is reaching for. On the Ketu side, fear of the hidden loses its hold. Research goes deep. Crises turn out to be turning points. The lesson is that facing the dark is how it stops being frightening.