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Exploration: Exoplanet UCF-1.01 Orbits GJ 436

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      • © NASA/JPL-Caltech

        Exoplanet UCF-1.01 Orbits GJ 436

        Astronomers using NASA's Spitzer Space Telescope have detected what they believe is an alien world just two-thirds the size of Earth -- one of the smallest on record. The exoplanet candidate, known as UCF-1.01, orbits a star called GJ 436, which is located a mere 33 light-years away. UCF-1.01 might be the nearest world to our solar system that is smaller than our home planet.

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