With the full crew on vacation, we bring you a special mashup episode featuring honorary TRC panelist Dr. Stuart Robbins of the Exposing PsuedoAstronomy blog and podcast.   First Stu takes the panel through the history of what we call planets and also addresses a listener email about the decision to reclassify Pluto.   Next he breaks down news headlines that claim astronomers have found a 9th planet in our solar system.