A small team of planetary scientists from the California Institute of Technology, Université Côte d'Azur and Southwest Research Institute reports possible new evidence of Planet 9. They have published their paper on the arXiv preprint server, and it has been accepted for publication in The Astrophysical Journal Letters.
You should forget anything you’ve read in this thread and play Outer Wilds ASAP. And you should go into it as blind as possible. Trust me; you only get to experience it for the first time once.