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WASHINGTON — Using data from NASA’s Wilkinson Microwave Anisotropy Probe (WMAP), scientists have identified an unexpected motion in distant galaxy clusters. The cause, they suggest, is the ...

There is a force called “dark flow” that exists outside our universe, and it’s tugging several galaxy clusters at 2 million mph toward an empty spot in space between Centaurus (pictured) and Vela.

A: When photons scatter off electrons moving toward us, the photons gain energy; when photons scatter off electrons moving away from us, they lose energy. This effect is called the kinematic ...

Astronomers have found that whole clusters of galaxies are moving in convoy towards a single point in the sky. This unexpected motion appears to be separate from the expansion of the universe and the ...

SOMETHING big is out there beyond the visible edge of our universe. That’s the conclusion of the largest analysis to date of over 1000 galaxy clusters streaming in one direction at blistering speeds.

In a bizarre finding that has disrupted the current understanding of the universe, astronomers have detected evidence of a massive gravitational force beyond the horizon of the observable universe.