S41 Ep1: Alien Planets Revealed
Video duration: 53:07Expires: 12/28/16Video has closed captioning.
Its a golden age for planet hunters: NASA's Kepler mission has identified more than 3,500 potential planets orbiting stars beyond our Sun. Some of them, like a planet called Kepler-22b, might even be able to harbor life. How did we come upon this distant planet?