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Milky Way black hole may be a colossal 'particle accelerator'

The black hole at the center of our Milky Way could be working like a cosmic particle accelerator, revving up protons that smash at incredible speeds into lower energy protons and creating high-energy gamma rays, University of Arizona astrophysicists say.

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Keywords: milky, way, black, hole, colossal, particle, accelerator

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   Is a second black hole lurking at the heart of the Milky Way? We know there is one colossal black hole at the centre of the galaxy, but so far no one has managed to verify the existence of a second. Now, an astrophysicist at the University if California says a simple test could answer the question. Look for a pair of hypervelocity stars hurtling out from the centre of the galaxy at breakneck speed.
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2. Ultrafast Star Escapes Black Hole
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3. Astronomers detect black hole in tiny 'dwarf' galaxy
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5. Chandra discovers light echo from the Milky Way's Black Hole
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