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Astronomy

A Mars-sized exoplanet

Analysis of Kepler data has yielded the smallest known mass for an exoplanet orbiting a normal star. Its mass and size are similar to those of Mars, setting a benchmark for the properties of exoplanets smaller than Earth. See Letter p.321

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Figure 1: The planetary system Kepler-138.

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References

  1. Jontof-Hutter, D., Rowe, J. F., Lissauer, J. J., Fabrycky, D. C. & Ford, E. B. Nature 522, 321–323 (2015).

    ADS  CAS  Article  Google Scholar 

  2. Borucki, W. et al. Science 327, 977–980 (2010).

    ADS  CAS  Article  Google Scholar 

  3. http://exoplanetarchive.ipac.caltech.edu/index.html

  4. Marcy, G. W. et al. Astrophys. J. Suppl. Ser. 210, 20 (2014).

    ADS  Article  Google Scholar 

  5. Gautier, T. N. III et al. Preprint at http://arxiv.org/abs/1001.0352 (2010).

  6. Fischer, D. A. et al. in Protostars and Planets VI (eds Beuther, H. et al.) 715–737 (Univ. Arizona Press, 2014).

    Google Scholar 

  7. Grant, R. History of Physical Astronomy (Bohn, 1852).

    Google Scholar 

  8. Ricker, G. et al. J. Astron. Telesc. Instrum. Syst. 1, 014003 (2014).

    ADS  Article  Google Scholar 

Download references

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Correspondence to Gregory Laughlin.

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Laughlin, G. A Mars-sized exoplanet. Nature 522, 290–291 (2015). https://doi.org/10.1038/522290a

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