Distant galaxy clusters mysteriously stream at a million miles per hour along a path roughly centered on the southern constellations Centaurus and Hydra. A new study led by Alexander Kashlinsky at NASA's Goddard Space Flight Center in Greenbelt, Md., tracks this collective motion -- dubbed the "dark flow" -- to twice the distance originally reported.
"It takes, on average, about an hour of telescope time to measure the distance to each cluster we work with, not to mention the years required [...]
Full story at http://spacefellowship.com/news/art19016/mysterious-cosmic-dark-flow-tracked-deeper-into-universe.html
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