New Horizons Deputy Project Scientist, Johns Hopkins University Applied Physics Laboratory
The Southwest Research Institute's John Spencer returns to tell us about the Cassini spacecraft's recent flight through the gas and dust plumes shooting out of Saturn's moon Enceladus. Emily Lakdawalla's Q&A explains how Cassini's orbit allows it to make discoveries like this. Bill Nye the Science Guy sees rocky, Earthlike planets all over the galaxy. Bruce Betts looks halfway across the universe for this week's What's Up, and he and Mat Kaplan announce a new space trivia contest.