SESAME is one of ten experiments on-board the lander Philae of the ESA Rosetta mission (Launch: 2. March 2004) that should reach comet 67P/ChuryumovGerasimenko in 2014. SESAME comprises the instruments CASSE, DIM, and PP.Comets have diameters of a few kilometers and thus belong to the smaller bodies of the Solar System, which was formed 4.6 billion years ago. Some scientists assume that impacting comets brought the building blocks of life and the water to the early Earth. As comets remained nearly unaltered since their formation, they can reveal important facts about the conditions and processes during the genesis of the Solar System.