Principal Investigator for MESSENGER, Columbia University
With its nail-biting orbital insertion a success, MESSENGER has renewed its exploration of our solar system's innermost planet. Principal Investigator Sean Solomon tells us what's in store. Emily Lakdawalla says goodbye to Stardust. Bill Nye points at the international eyes in the sky that are helping Japan. Bruce Betts and Mat Kaplan salute the flag of Mars and then give it away on What's Up. Also, a new space trivia contest.