Abstract
We know that ultra-high-energy protons can travel on average only about 160 million light years before interacting with the cosmic microwave background and losing energy. Ultra-high-energy photons can’t even travel that far before being absorbed by the background. Does that mean it’s impossible to investigate the distant, high-energy Universe? Fortunately not. There’s another messenger that can bring information on distant high-energy sources: the neutrino.
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© 2012 Springer Science+Business Media, LLC
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Webb, S. (2012). Deep sea, deep snow … deep space. In: New Eyes on the Universe. Springer Praxis Books(). Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2194-8_7
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DOI: https://doi.org/10.1007/978-1-4614-2194-8_7
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Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4614-2193-1
Online ISBN: 978-1-4614-2194-8
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