New Planet: An Earth-Like World, 600 Light-Years Away?

NASA's Kepler space telescope has found a new planet -- the most Earth-like yet -- circling a yellow star similar to Earth's sun and 600 light-years away, according to the space agency. The most promising thing about this world, called Kepler-22b for now, is that it's in the so-called Goldilocks zone around its host star. Its surface temperature is estimated at an average of 72 degrees, which means liquid water -- considered essential for life as we know it -- would be possible there. "We are...Full Story
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