All planetesimals born near the Kuiper belt formed as binaries

  title={All planetesimals born near the Kuiper belt formed as binaries},
  author={Wesley C. Fraser and Michele T. Bannister and Rosemary E. Pike and Micha{\"e}l Marsset and Megan E. Schwamb and J. J. Kavelaars and Pedro Lacerda and David Nesvornyy and Kathryn Volk and Audrey C. Delsanti and Susan D. Benecchi and Matthew J. Lehner and Keith S. Noll and Brett J. Gladman and J. M. Petit and Stephen D. J. Gwyn and Ying-Tung Chen and Shiang‐Yu Wang and Mike Alexandersen and Todd W. Burdullis and Scott S. Sheppard and Chadwick A. Trujillo},
  journal={Nature Astronomy},
The discovery of several Kuiper belt objects (KBOs) with anomalous properties (they are blue-coloured, whereas KBOs of the same type are red, and they are all binaries) gives constraints on formation processes in the outermost region of the Solar System. 

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