Principal Investigator for MESSENGER, Columbia University
On January 14, MESSENGER will become the first spacecraft to visit Mercury in 33 years. Principal Investigator Sean Solomon prepares us for this historic flyby. Emily Lakdawalla explains how something can be supersonic in silent space, and Bruce Betts has a Year in Space calendar to give away in a new space trivia contest during his What's Up visit with Mat Kaplan. Also, the premiere of Bill Nye the Science Guy's weekly space exploration commentary.