141: Eyes on the back of your head with Dr. Tholen
Dr. Dave Tholen talks about near-Earth asteroids. He explains why they can be difficult to observe, and how he manages to spot them anyway. He also tells the story of a particularly famous asteroid that he discovered, and sets the record straight about its name.
Hear the performance of "Pirates of the Caribbean" here.
Image: Graphic showing the path of asteorid 99942 Apophis changing after a close pass with Earth.