A neutrino interacts with the nucleus of an oxygen atom in the atmosphere, producing a muon. As the muon moves through Antarctic ice, it gives off Cherenkov radiation, shown in blue, which is detected by instruments in the spheres. As the muon moves through the array of these spheres, it creates a track that specifies its direction in space. ( Image provided by the AMANDA-II Collaboration).








AMANDA
researchers Darryn Schneider and Katherine Rawlins hold one
of the light-detection modules