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Neutrino particle that impacted in the Antarctic traced to galaxy 3.7 billion light years away


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In a cosmic first, scientists detect ‘ghost particles’ from a distant galaxy

 

When the sun was young and faint and the Earth was barely formed, a gigantic black hole in a distant, brilliant galaxy spat out a powerful jet of radiation. That jet contained neutrinos — subatomic particles so tiny and difficult to detect they are nicknamed “ghost particles.”

 

Four billion years later, at Earth’s South Pole, 5,160 sensors buried more than a mile beneath the ice detected a single ghostly neutrino as it interacted with an atom. Scientists then traced the particle back to the galaxy that created it.

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