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Possible Nearby Exoplanet Smaller than Earth (Update)

Possible Nearby Exoplanet Smaller than Earth (Update)

Update: 2012-08-07

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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!

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Possible Nearby Exoplanet Smaller than Earth (Update)

Possible Nearby Exoplanet Smaller than Earth (Update)

NASA's Spitzer Science Center / IPAC / NASA / Caltech