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

The suburbia of the Milky Way does not form a ball of matter with the center at its center. Rather, the mass around it is arranged in a wide, flattened form, which alters the sense of gravity back ...

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.

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

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This illustration shows a stage in the predicted merger ...

While the appearance of Andromeda is not a once-in-a-lifetime event, it’s rare for someone to come across it at the right time and record it in a photograph.

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 ...

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

Andromeda and GEM now determine how ads are selected, ranked, and sequenced across Meta. Here’s what changed and what drives ...

Elam previously founded Bachmanity Capital and was an early investor in defense technology company Thor Dynamics. He co-authored the bipartisan Kids Online Safety Act and was appointed a United ...