The Two-Way
Originally published on Thu April 18, 2013 5:05 pm
NASA's Kepler spacecraft has discovered three new "habitable zone" planets that are close to Earth's size, even if they're not all that close to Earth.
NPR's Joe Palca reports, the trio of worlds is about 1,200 light years away and are thought to lie in the so-called "Goldilocks zone" — where it's not too hot and not too cold for liquid water.
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