A sheet of dark matter lying beyond the boundary of the Local Group is responsible for this.

For years, astronomers have observed the strange motion of Andromeda, the Milky Way’s closest large galactic neighbor. While ...

Researchers have long thought that the Milky Way would collide with the Andromeda galaxy in four to five billion years. This scientific illustration depicts Earth's horizon four billion years in the ...

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.

For years, astronomers have believed that the fate of the Milky Way was tied to our largest neighboring galaxy, the Andromeda galaxy. However, a new study now says that this future Milky Way merger ...

The Andromeda galaxy, left, is about to collide with part of the Milky Way, as seen from Earth, in a hypothetical merger scenario. Credit: NASA illustration "Based on the best available data, the fate ...

Computer simulations carried out by astronomers from the University of Groningen in collaboration with researchers from Germany, France and Sweden show that most of the (dark) matter beyond the Local ...

It turns out that looming collision between our Milky Way and Andromeda galaxies might not happen after all. Astronomers reported Monday that the probability of the two spiral galaxies colliding is ...