Nature Paper by Ford, Lystad, & Rasio:   preprint, paper

  Northwestern University Press Release

  National Science Foundation Press Release

  UC Berkeley Press Release





  Artist's Renditions of the Upsilon Andromedae planetary system
  Credit: Sylwia Walerys, Northwestern University

  Planet-Planet Scattering Animation:
  Low-resolution QuickTime (3 MB)
  Broadcast quality QuickTime (30 MB)

  Credit: Trent Schindler, National Science Foundation

  For further information contact: Eric Ford, Verene Lystad, or Fred Rasio.

  Many more images and animations on these planets can be found online, for example at:

  More information on the Upsilon Andromedae system can be obtained from: