A sub-Mercury-sized exoplanet

  title={A sub-Mercury-sized exoplanet},
  author={Thomas Barclay and Jason F. Rowe and Jack J. Lissauer and Daniel Huber and François Fressin and Steve B. Howell and Stephen T. Bryson and William J. Chaplin and Jean-Michel Desert and Eric D. Lopez and Geoffrey W. Marcy and Fergal Robert Mullally and Darin Ragozzine and Guillermo Torres and Elisabeth R. Adams and Eric Agol and David Barrado and Sarbani Basu and Timothy R. Bedding and Lars A. Buchhave and David Charbonneau and Jessie L. Christiansen and J{\o}rgen Christensen-Dalsgaard and David R. Ciardi and William D. Cochran and Andrea K. Dupree and Yvonne P. Elsworth and Mark Everett and Debra A. Fischer and Eric B. Ford and Jonathan J. Fortney and John Charles Geary and Michael R. Haas and Rasmus Handberg and Saskia Hekker and Christopher E. Henze and Elliott P. Horch and Andrew W. Howard and Roger C. Hunter and Howard T. Isaacson and Jon M. Jenkins and Christoffer Karoff and Steven D. Kawaler and Hans Kjeldsen and Todd C. Klaus and David W. Latham and Jie Li and Jorge Lillo-Box and Mikkel N. Lund and Mia S. Lundkvist and Travis S. Metcalfe and Andrea Miglio and Robert Morris and Elisa V. Quintana and Dennis Stello and Jeffrey C. Smith and Martin D. Still and S. Thompson},
Since the discovery of the first exoplanets, it has been known that other planetary systems can look quite unlike our own. Until fairly recently, we have been able to probe only the upper range of the planet size distribution, and, since last year, to detect planets that are the size of Earth or somewhat smaller. Hitherto, no planets have been found that are smaller than those we see in the Solar System. Here we report a planet significantly smaller than Mercury. This tiny planet is the… 

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