Discovered in 2014, what was the first validated Earth-size planet to orbit a distant star in the habitable zone?
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Kepler-186f
Kepler-186f is located about 500 light-years from Earth and orbits a red dwarf star that is cooler and smaller than our Sun. It is considered a 'cousin' to Earth because its size and distance from its star suggest it could potentially hold liquid water on its surface.
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- Which exoplanet, validated in 2014, was the first Earth-sized world found orbiting in its star's habitable zone?