WASP-33 System

One of six Retrograde Exoplanets (2010)

 * http://www.sciencenews.org/view/generic/id/58275/title/Backward_planets_may_have_flipped_into_place
 * http://www.ia.ucsb.edu/pa/display.aspx?pkey=2220#description
 * http://news.sciencemag.org/sciencenow/2010/04/some-planets-play-a-mean-game-of.html
 * http://www.skyandtelescope.com/news/90752569.html
 * http://www.eso.org/public/news/eso1016/