Astonomers Find Three New Planets

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We take a look at three new planets discovered orbiting distant stars. The new finds are smaller than previous extrasolar planet discoveries, on par with the planet Neptune in our solar system. Huge gas-giant planets have been easier to spot. We'll talk about the find, and what it does to the odds of finding life elsewhere in the universe.

Guests:

Geoffrey Marcy, professor of astronomy at the University of California, Berkeley

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