Kepler discovers first Earth-sized exoplanets

@article{Hand2011KeplerDF,
  title={Kepler discovers first Earth-sized exoplanets},
  author={Eric Hand},
  journal={Nature},
  year={2011}
}
  • E. Hand
  • Published 20 December 2011
  • Physics, Geology
  • Nature
Planet hunters arrive at an important goal for NASA's space telescope. 
3 Citations
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References

Two Earth-sized planets orbiting Kepler-20
TLDR
A statistical method is applied to show that the likelihood of the planetary interpretation of the transit signals is more than three orders of magnitude larger than that of the alternative hypothesis that the signals result from an eclipsing binary star.