Principal Investigator for Phoenix, University of Arizona
Phoenix Mars Lander Principal Investigator Peter Smith returns to comment on confirmation of the death of his polar lander. Data from the successful mission is still being analyzed by scientists around the world, and it opened another option for life on the red planet. Emily Lakdawalla on the discovery of 11,000 asteroids by the WISE spacecraft. Bill Nye counts down NASA's six new space exploration technology efforts. Bruce and Mat celebrate the night sky and more in What's Up, including a a new space trivia contest.