© Lawrence Berkeley National Laboratory.
Buried about two kilometers underground in Ontario's Vale Creighton mine, the Sudbury Neutrino Observatory's neutrino detector collected information about solar neutrinos from 1999 to 2006. Its initial results, published in 2001, indicated that solar neutrinos oscillate. The spherical structure shown here supports the photomultiplier tubes that detect light generated by fast-moving particles produced when a neutrino interacts with the detector. (Unit: 1)