A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding ...

On a clear night, the Milky Way and the Andromeda galaxy look like close neighbors. In space, they really are.

In the close Universe, the distance typically is a predictor of speed: more distant galaxies recede more rapidly. Another rule around the Milky Way has long been strangely compliant, however. Most of ...

Computer simulations carried out by astronomers from the University of Groningen in collaboration with researchers from ...

A flat plane of dark matter beyond the Local Group may explain why nearby galaxies move away from us instead of falling ...

A new simulation tool lets scientists explore whether self-interacting dark matter could reshape galaxies from the inside out ...

Few scientific ideas have leapt from philosophy seminars to dinner-table debates as quickly as the claim that our universe might be an artificial construct. The simulation hypothesis promises a ...

The discovery reinforces established theories about space. There could be many more satellite galaxies orbiting the Milky Way than previously thought or observed, according to astronomers. As many as ...

The solution to a persistent astronomical question that has puzzled scientists for half a century has emerged not from direct observation, but from the computing power of sophisticated computer ...

New models explain how small black holes in the early universe beat the clock and grew into massive objects within millions ...