The latest planetary discoveries by the Kepler satellite bring us "a bit closer" to finding a planet similar to Earth, says NASA's John Grunsfeld:
The Kepler spacecraft has certainly turned out to be a rock star of science.
The discovery of these rocky planets in the habitable zone brings us a bit closer to finding a place like home.
It is only a matter of time before we know if the galaxy is home to a multitude of planets like Earth, or if we are a rarity.
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