Studying the Rings With Imke de Pater

We're learning so much about the rings that surround the gas giant planets in our solar system, yet many mysteries remain. We'll chat with astronomer Imke de Pater of UC Berkeley, and get news of this year's ring crossings at Uranus. Emily Lakdawalla's Q&A visits more than the two biggest asteroids, while Bruce Betts takes Mat Kaplan and you on a tour of the night sky and announces a new space trivia question.