Kepler discovers multiple planet system in resonance
http://cosmiclog.msnbc.msn.com/_news/2010/08/26/4974937-planets-spotted-in-changing-orbits
All closer to their Sun than Mercury is to ours - orbital periods of 19.24 and 38.91 Earth days for two Saturn-sized planets and a possible hot terrestrial planet at only 1.6 Earth days.