From interacting binaries to exoplanets essential modeling tools : proceedings of the 282th Symposium of the International Astronomical Union held in Tatranská Lomnica Slovakia July 18 22 2011 In IAU Symposium 282 members of the exoplanet and binary star communities unite for the first time to discuss the state of the art discovery imaging modeling and analysis tools used to study stars brown dwarfs and exoplanets in multiple object systems. They describe detection techniques using advanced telescopes and detectors including the Kepler mission and the proposed Gaia and LSST projects. Imaging techniques discussed include adaptive optics interferometry polarimetry and tomography while key modeling tools are covered in detail. Other topics include simulations of formation mechanisms in binary star systems non conservative evolution of binary stars the formation and evolution of planets and a theory for the structure atmospheres and evolution of giant exoplanets. The volume concludes with hydrodynamic simulations models of planetary atmospheres and the habitability of exoplanets. These proceedings demonstrate how sophisticated modeling codes bridge the gap between theory and observations and increase our understanding of binary and multiple systems. Back cover