Welcome to the CERN OPENDAYS: Our Universe is Yours

CERN is one of the world’s largest and most respected centres for scientific research. Its business is fundamental physics: finding out what the Universe is made of and how it works. At CERN, large and highly complex scientific instruments are used to study the basic constituents of matter: the fundamental particles. By studying what happens when these particles collide, physicists further our understanding of the laws of Nature