NASA's Chief Scientist on the Vision for Space Exploration

Dr. James Garvin is an enthusiastic supporter of the Vision for Space Exploration, and NASA's new plans for human exploration. Hear his thoughts, and comment from Lou Friedman of the Planetary Society, on this week's show. A classic Q&A segment about craters from Emily Lakdawalla, and Bruce Betts on What's Up in the night sky and a new space trivia contest.