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

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 ...

Astronomers have uncovered evidence that the Milky Way is not drifting through space alone but is embedded in a vast, flat structure of dark matter stretching tens of millions of light-years. The ...

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 ...

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 ...

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

Is it time to rethink one of physics’ fundamental forces?

Astronomers have long chased a hard question: how did black holes grow so huge so fast. Researchers at Maynooth University in ...