Definitions for "Snu"
solar neutrino unit. a unit used by astrophysicists to measure the rate at which neutrinos from the Sun are detected on Earth. Neutrinos are elementary particles with no charge and little or no mass (in 1999 it was reported that neutrinos do have a small mass). Scientists want to detect neutrinos because they carry crucial information about processes deep inside the Sun, but neutrinos are very hard to catch: most of them pass right through the Earth without interacting with anything. The solar neutrino unit, therefore, is extremely small: it is defined to be 10-36 neutrino capture per target atom per second.
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