THE GIST
A planet has been found in the "habitable zone" -- a region where liquid water could exist.
The newly confirmed planet, Kepler-22b, is the smallest yet found to orbit in the habitable zone of a star similar to our sun.
Previous research hinted at the existence of near-Earth-size planets in habitable zones, but confirmation had been elusive.
A planet about twice the size of Earth has been confirmed to exist right in the middle of the "habitable zone" around its star, which is much like our own.
Previous research had hinted at the existence of such Earth-like planets, where liquid water could exist, but this is the first time such a life-friendly alien planet has been confirmed.
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