Each week, Planetary Radio visits with a scientist, engineer, project manager, advocate or writer who can provide a unique perspective on the quest for knowledge about astronomy, our solar system and beyond. We also showcase regular features that raise your space IQ while they put a smile on your face. In addition, host Mat Kaplan is joined every week by Planetary Society colleagues Bill Nye the Science Guy, Bruce Betts, and Emily Lakdawalla to discuss the latest news about NASA and the Planetary Society. Visit our web site for an episode guide and broadcast directory.