The dark flow hypothesis. A region of the observable universe is being influenced by a mysterious something outside the observable universe (which we can't observe). Source: universe-review.ca
The hypothetical dark flow seen in the movement of galaxy clusters requires that we can reliably identify a clear statistical correlation in the motion of distant objects which are, in any case, flowing outwards with the expansion of the universe and may also have their own individual (or peculiar) motion arising from gravitational interactions. (...)
Read the rest of Astronomy Without A Telescope – Dark Statistics (680 words)
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Full story at http://www.universetoday.com/84227/astronomy-without-a-telescope-dark-statistics/
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