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+ - Giant black holes power highest-energy cosmic rays

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mcgrew (sm62704)
mcgrew (sm62704) writes "New Scientist says

The finding, from a telescope array 10 times the size of Paris, solves a long-standing mystery about the origins of the most energetic cosmic rays that strike the Earth's atmosphere....

[T]he origins of the highest-energy particles, which travel within a whisker of the speed of light, have been puzzling. A single proton can have as much energy as a tennis ball served at 100 kilometres per hour.

Astronomers found it difficult to explain how particles are accelerated to such enormous speeds.
The article says these new findings herald "the beginning of cosmic ray astronomy"."
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Giant black holes power highest-energy cosmic rays

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