Astronomers have detected high-energy neutrinos coming from within our Milky Way galaxy, potentially opening up an exciting new window of research, a new study reports.
Neutrinos are extraordinarily difficult to spot, as they rarely collide with atoms. A light-year's worth of lead would stop only about half of the neutrinos flying through it (which explains why neutrinos have been dubbed "ghost particles").
Neutrinos are created from radioactive decay, such as in nuclear reactors, or when extraordinarily high-energy particles strike atoms. The friskiest types feature energies millions to billions of times higher than those produced by the fusion reactions that power
stars.
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