It is always fascinating when science fiction becomes reality. This is the case with the Kepler-16b, a binary system that proved to host a cold giant planet (like Saturn), which compiles from gas and rocks. This opens a wide new category of planetary systems since most of the stars belong to a binary system.
For more information see NASA’s Kepler announcement and the related page with star/planet’s properties, along with the publication (Doyle L et al 2011: Science – in press, arXiv-1109.3432).