The recent (understandable!) interest in the object Ultima Thule (2014-MU69) reminds us of a puzzle about the outer Solar system. Specifically: just how heavy are all the Trans-Neptunian Objects, if you combine them? That question has direct relevance to the most comprehensive creation theory, the Hydroplate Theory of Walter T. Brown. Someone, about a year ago, cited two articles that separately allege that all the Trans-Neptunian Objects is at least a tenth as heavy as the Earth itself. In fact, the authors assert that all the TNOs might be half as heavy as the Earth! So before the origins debate bogs itself down in any more confusion, let’s look—hard—at the sources.