Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities

@article{Carter2012Kepler36AP,
  title={Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities},
  author={Joshua A. Carter and Eric Agol and William J. Chaplin and Sarbani Basu and Timothy R. Bedding and Lars A. Buchhave and J{\o}rgen Christensen-Dalsgaard and Katherine M. Deck and Yvonne P. Elsworth and Daniel C. Fabrycky and Eric B. Ford and Jonathan J. Fortney and Steven J. Hale and Rasmus Handberg and Saskia Hekker and Matthew J. Holman and Daniel Huber and C. Karoff and Steven D. Kawaler and Hans Kjeldsen and Jack J. Lissauer and Eric D. Lopez and Mikkel N. Lund and Mia S Lundkvist and Travis S. Metcalfe and Andrea Miglio and Leslie A. Rogers and Dennis Stello and William J. Borucki and Stephen T. Bryson and Jessie L. Christiansen and William D. Cochran and John Charles Geary and Ronald L. Gilliland and Michael R. Haas and Jennifer Susan Hall and Andrew W. Howard and Jon M. Jenkins and Todd C. Klaus and David G. Koch and David W. Latham and Phillip J. MacQueen and Dimitar D. Sasselov and Jason H. Steffen and Joseph D. Twicken and Joshua N. Winn},
  journal={Science},
  year={2012},
  volume={337},
  pages={556 - 559}
}
So Close and So Different In our solar system, the rocky planets have very distinct orbits from those of the gas giants. Carter et al. (p. 556, published online 21 June) report on a planetary system where this pattern does not apply, posing a challenge to theories of planet formation. Data from the Kepler space telescope reveal two planets with radically different densities orbiting the same star with very similar orbital periods. One planet has a rocky Earth-like composition and the other is… 
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