Dawn Chief Engineer and Mission Director, Jet Propulsion Laboratory
After a very productive and exciting year orbiting Vesta, Dawn has fired up its ion engine and headed for the solar system's biggest asteroid, Ceres. Mission Director and Chief Engineer Marc Rayman tells us all is well, and there's much more science ahead. Don't miss the video tour of ulta space enthusiast Marc's home! Emily celebrates the public release of Dawn's data about Vesta, while Bill Nye reports on a meeting with top NASA administrators. While Bill's away, Mat and Bruce will play in his office. Check out the toys and the night sky in this week's What's Up.