A Plenitude of Planets

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Astronomers are receiving what they've been waiting for from NASA's Kepler planet-hunting satellite: the discovery of new planets in Earth's Milky Way galaxy that might be habitable. Some 1,235 possible planets have been discovered orbiting other stars.  If they're confirmed, that would triple the number of known planets. Lisa Kaltenegger is an astronomer at the Harvard-Smithsonian Center for Astrophysics.




Warren Olney