MYSTERY GALACTIC GAMMA-RAY 'BUBBLES' DEFY EXPLANATION: In 2010, astronomers announced the discovery of two vast — and very mysterious — bubbles of gamma-ray emissions towering above and below our galaxy’s disk. Four years on, after oodles of analysis, the source of these bubbles is as mysterious as ever: http://dne.ws/1kbgzGo
Saturday, 2 August 2014
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