Originally published on Sun April 21, 2013 4:04 pm
Originally published on Mon May 13, 2013 8:20 am
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.