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Submission + - Kepler discovers first Earth-sized exoplanets (nature.com)

ananyo writes: NASA's Kepler telescope has reached one of its major mission milestones: finding an Earth-sized planet outside the Solar System. What is more, it has done it twice in the same star system. Whizzing around the star Kepler-20, about 290 parsecs (946 light years) from Earth, is not only an Earth-sized planet, but also something just a touch smaller — a Venus.
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Kepler discovers first Earth-sized exoplanets

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