Unknown "Structures" Not Tugging on the Universe After All?
"Dark flow" explained away by new data, old physics.
In 2008, a team of scientists took measurements of hundreds of galaxy clusters and calculated that everything in the visible universe—and likely beyond—is flowing at 2 million miles (3.2 million kilometers) an hour in the same direction.
The data couldn't be explained by the distribution of matter in the known universe, so the scientists suggested that chunks of matter had been pushed out shortly after the big bang, and their gravity is now pulling on everything around us.
In 2010 the same team released a second study with data on twice as many galaxy clusters as their 2008 work. That research found that dark flow extends even deeper into the universe than previously reported: out to at least 2.5 billion