Science Scratching the Surface: Why is Jupiter not a Star? KUAF | By Caitlin Ahrens Published July 2, 2019 at 11:32 AM CDT Facebook Twitter LinkedIn Email Listen • 2:09 1 of 2 2 of 2 On this episode of Scratching the Surface, Caitlin Ahrens explains how close Jupiter was to becoming the second star in our solar system and what impact that would've had. Caitlin Ahrens - The Pluto Manager .