Kepler-20f is the closest object to the Earth in terms of size ever discovered. With an orbital period of 20 days and a surface temperature of 800 degrees Fahrenheit 430 degrees Celsius, it is too hot to host life, as we know it.
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Details
Title: Kepler-20f -- An Earth-size World Artist Concept
Creator: NASA/Ames/JPL-Caltech
Date Created: 2011-12-20
Rights: JPL
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