Alien Planets Revealed
Season 41 Episode 1 | 53m 7s
It’s 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?
Expired: 01/31/19Video has closed captioning.
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