Planetary Astronomer, California Institute of Technology
CalTech Planetary Astronomer Mike Brown and his colleagues have outdone themselves with discovery of what may be the solar system's tenth planet, far beyond Pluto. He talks with us about the recent find. Emily Lakdawalla's Q&A looks at Saturn in the raw...unprocessed images from Cassini. Bruce Betts knows What's Up in the night sky, along with a new space trivia contest.