Right now, we know of about 4,000 confirmed exoplanets, mostly thanks to the Kepler mission. TESS, the Transiting Exoplanet Survey Satellite, will likely raise that 4000 by a lot. But what about the stars that all of these planets orbit? A new study from the Astrophysical Institute and University Observatory of the University of Jena identified over 200 exoplanets that exist in multiple star systems. The study is part of the effort to understand how host stars shape the formation and evolution of planets.