Planetary Radio Host and Producer, The Planetary Society
Mat Kaplan spends the day at this gathering of young space enthusiasts who discussed everything from what to do about NASA to making space 'sexy.' Emily Lakdawalla says Stardust is almost out of fuel as it encounters Tempel 1. Bill Nye the Planetary Guy is also celebrating humanity's second visit to this comet. Bruce Betts and Mat reveal more secrets of the universe on What's Up, including a new space trivia contest .