AN ANCIENT EXTRASOLAR SYSTEM WITH FIVE SUB-EARTH-SIZE PLANETS

@article{Campante2015ANAE,
  title={AN ANCIENT EXTRASOLAR SYSTEM WITH FIVE SUB-EARTH-SIZE PLANETS},
  author={Tiago L. Campante and Thomas Barclay and Jonathan J. Swift and Daniel Huber and Vardan Adibekyan and William D. Cochran and Christopher J. Burke and Howard T. Isaacson and Elisa V. Quintana and Guy R. Davies and V{\'i}ctor Silva Aguirre and Darin Ragozzine and Reed L. Riddle and Christoph Baranec and Sarbani Basu and William J. Chaplin and J{\o}rgen Christensen-Dalsgaard and Travis S. Metcalfe and Timothy R. Bedding and Rasmus Handberg and Dennis Stello and John M. Brewer and Saskia Hekker and Christoffer Karoff and Rea Kolbl and Nicholas M. Law and Mia S. Lundkvist and Andrea Miglio and Jason F. Rowe and Nuno C. Santos and Christa L. Van Laerhoven and Torben Arentoft and Yvonne P. Elsworth and Debra A. Fischer and Steven D. Kawaler and Hans Kjeldsen and Mikkel N. Lund and Geoffrey W. Marcy and S{\'e}rgio G. Sousa and Alessandro Sozzetti and Timothy R. White},
  journal={The Astrophysical Journal},
  year={2015},
  volume={799},
  pages={170}
}
The chemical composition of stars hosting small exoplanets (with radii less than four Earth radii) appears to be more diverse than that of gas-giant hosts, which tend to be metal-rich. This implies that small, including Earth-size, planets may have readily formed at earlier epochs in the universe's history when metals were more scarce. We report Kepler spacecraft observations of Kepler-444, a metal-poor Sun-like star from the old population of the Galactic thick disk and the host to a compact… 
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120 Citations
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Methods Citations
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