Study challenges key evidence for hypothetical Planet Nine

For five years, astronomers have pursued the possibility of a hidden giant at the far edge of our solar system — a world so distant it takes fifteen thousand years to complete a single orbit. Now, a team from the University of Michigan suggests that what looked like gravitational evidence for this Planet Nine may instead be a mirror reflecting the limits of human observation itself. The universe, as ever, resists easy conclusions, and the question of whether we are discovering the cosmos or merely the shape of our own searching remains open.