Author Dava Sobel's New Book About Copernicus: A More Perfect Heaven

Author and historian Dava Sobel returns to talk about her new fascinating book, A More Perfect Heaven -- How Copernicus Revolutionized the Cosmos. Bill Nye laments the probable loss of Russia's Phobos-Grunt spacecraft. What's Up with Bruce Betts and Mat Kaplan is a real slap in the head this week, and includes a new space trivia contest. Emily Lakdawalla returns next week.

Related Links:

• Dava Sobel's Website
• Dava Sobel's Amazon Page
• ESA Ends Support for Phobos-Grunt Mission