April 19, 2012

Where in Universe Do Cosmic Rays Come From?

Jason Palmer, BBC News


AP Photo

The mystery surrounding the source of the highest-energy particles known in the Universe has grown deeper.

The particles, known as cosmic rays, can show up with energies a million times higher than the biggest particle accelerators on Earth can produce.

Astrophysicists believed that only two sources could make them: supermassive black holes in active galaxies, or so-called gamma ray bursts.

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TAGGED: Supermassive Black Holes, Gamma-ray Bursts, Cosmic Rays

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