On This Episode
spectroscopist and Deep Impact co-investigator for University of Maryland
Spectroscopist and Deep Impact co-investigator Jessica Sunshine reviews the wonders revealed by Deep Impact's smack down with comet Tempel 1 last July. Emily Lakdawalla's Q and A looks for spots on Mars that might protect astronauts from deadly radiation. Another What's Up look at the night sky and a trivia contest with Bruce Betts.