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San Francisco, 5:19 AM
Mon Dec 28
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Heaviest, Farthest Cluster Points Toward Dark Energy
The XMM-Newton space telescope has been really into dark and heavy stuff lately. No, the x-ray observatory didn't find its parents' old Black Sabbath albums — it found the most massive galactic cluster on record, a conglomerate of galaxies weighing more than 1,000 times as much as the Milky Way. The cluster's extreme distance is a puzzling paradox, or it might help prove that the universe is full of mysterious dark energy. More »