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The sun produces huge volumes of nearly massless particles called neutrinos. Neutrinos ( little neutron in Italian, coined by Enrice Fermi) reveal themselves when one strikes an atom and generates a flare of light, but the event is rare. This image shows what this event looks like inside a liquid-filled neutrino detector buried deep underground. The direction and intensity of the flare indicates the source and energy of the neutrino. A neutrino is any of three electrically neutral subatomic particles with extremely low mass. These include the electron-neutrino, the muon-neutrino, and the tau-neutrino. The study of neutrinos that come to the earth as cosmic rays suggests that neutrinos can transform into each other in a process called neutrino.
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