: Astronomie: neutrino

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neutrino

The neutrino is a fundamental particle with no charge and very little mass, that interacts only by the weak force and by gravity. It is a member of the lepton (lightweight) family of particles to which the electron also belongs. Neutrinos travel close to the speed of light. Ghostlike in their ability to avoid interacting with matter, it has been estimated that neutrinos could pass through a light-year of solid lead with only a 50% chance of being absorbed. The name, which means "little neutral one" in Italian, was coined by Enrico Fermi in 1933. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/N/neutrino.html)

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