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The discovery was announced December 5, 2011.The planet was originally discovered on Kepler's third day of science operations in mid-2009. The third transit was detected in late 2010. Additional confirmation data was provided by the Spitzer Space Telescope and ground-based observations. The planet's radius is roughly 2.4 times the radius of Earth; it is 600 light years away from Earth, in orbit around Kepler-22.
Article posted December 7, 2011 at 11:36 PM •
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A new planet is born! Kepler-22b
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