The invention of various other trans-Neptunian objects, such as Quaoar and Sedna, continued to erode arguments that Pluto was Excellent from the rest of the trans-Neptunian inhabitants. In October 2015, astronomer Jean-Luc Margot with the College of California Los Angeles proposed a metric for orbital zone clearance derived from https://www.scientology.de/faq/scientology-attitudes-and-practices/what-does-clear-the-planet-mean.html