A galaxy cluster 10.4 billion light-years away is bending space and glowing with free-floating stars — and its core mass is ...

Dark matter halos are everywhere in the universe, yet no telescope can see them. These vast, invisible structures surround galaxies and galaxy clusters, using gravity to hold them together and steer ...

Galaxy clusters are the largest gravitationally bound structures in the universe, with each containing hundreds or even thousands of galaxies. When two of these giants collide, they send powerful ...

There is a pattern found in nature. It is indeed the largest pattern there is. It is so vast that it spans the universe, filling up its observable volume. The pattern is made of individual units in ...

Galaxy clusters are the most massive objects in the universe held together by gravity, containing up to several thousand individual galaxies and huge reservoirs of superheated, X-ray-emitting gas. The ...

Cosmological accretion shocks created during the formation of galaxy clusters are a ubiquitous phenomenon all around the universe. These shocks and their features are intimately related with the ...

A newly discovered radio galaxy with a striking bow-and-arrow appearance is providing astronomers with an unprecedented view ...

Astronomers have explained how a galaxy cluster maintains its heat, despite emitting X-rays that cool the hot gas at its center. The group discovered the existence of a fast-moving, high-temperature ...

Strange behavior in a massive cluster of merging galaxies could be explained if dark matter, the universe's most mysterious stuff, can collide with itself. However, the most favored model of cosmology ...

Galaxy clusters host an intracluster medium (ICM) rich in thermal plasma, but interwoven with nonthermal components including relativistic particles and magnetic fields. Diffuse radio emission emerges ...

The XRISM science team, including members of Nagoya University, has explained how galaxy clusters maintain their heat despite emitting X-rays, which typically have a cooling effect on the hot gas. By ...