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Most powerful 'ghost particle' ever may have come from a cosmic particle accelerator fed by a black hole

Most powerful 'ghost particle' ever may have come from a cosmic particle accelerator fed by a black hole
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<strong>An illustration shows a black hole-powered blazar firing a powerful ghost particle at Earth </strong>

<strong>An illustration shows a black hole-powered blazar firing a powerful ghost particle at Earth </strong>
Originally published by Space.com Read original →