First the Pioneer Anomaly, now a new challenge to physics appears in the Flyby Anomaly. JPL celestial mechanics expert John Anderson will explain what is known about this mysterious change in the velocity of spacecraft. Bill Nye the Science Guy waxes poetic about the recent lunar eclipse. A special report from Emily Lakdawalla on the new evidence of rings around a moon of Saturn, and Bruce Betts joins host Mat Kaplan for a What's Up! look at the night sky, along with a tough new space trivia contest.