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

Andromeda is also a flattened spiral like the Milky Way, but it's twice as large — 220,000 light-years across versus 105,000 for the Milky Way — and crammed with a trillion suns. Can you even begin to ...

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

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

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

The vast "sheet" of dark matter could explain why almost all of our galactic neighbors are running away from us.

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 observations from the Hubble Space Telescope have revealed surprising activity inside the Andromeda galaxy. The data ...

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

Since its launch in 1990, Hubble has transformed our understanding of the cosmos. The space telescope revealed a universe teeming with galaxies, stars, and planets instead of what we once saw as empty ...

That legacy is what made Mass Effect: Andromeda such a troubled release. When it arrived in 2017, it had to live up to the trilogy’s reputation as well as evolve it in a meaningful way. Nostalgia and ...

Numerous stories have been written about the growing swarm of Starlink satellites in low earth orbit (LEO) over the past few years, as astronomers grow increasingly worried about the crafts’ impact on ...