For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...

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 ...

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

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 ...

The existence of massive, elliptical galaxies in the early universe has puzzled astronomers for two decades. An international ...

"We studied the last several orbits before the merger, when the entwined magnetic fields undergo rapid and dramatic changes, ...

The group of Prof. Habouzit has strong theoretical expertise in the formation and evolution of galaxies and their massive black holes (MBHs), as well as advanced simulation modeling.

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

In the close Universe, the distance typically is a predictor of speed: more distant galaxies recede more rapidly. Another ...

The young galaxy cluster existed about 12.8 billion years ago and has an estimated mass 20 trillion times that of the sun ...

As gas falls toward a black hole, it heats up and shines. If the glow becomes intense enough, it can push incoming gas away. Astronomers call this balancing point the Eddington limit, and for decades ...