Planet non-Xistent?

Turns out X doesn’t mark the spot. NASA’s WISE space telescope has found no evidence for “Planet X”,  a hypothetical body supposed to inhabit the outer reaches of the  solar system. WISE searched 10,000 times further than the distance from Earth to the sun and found nothing larger than Saturn. On the plus side, searches far beyond our solar system uncovered 3525 new stars and brown dwarfs.