The cluster is very bright at X-ray wavelengths and is one of the most extensively studied galaxy clusters at X-ray and radio ...

Using the James Webb Space Telescope, astronomers have spotted a massive and densely packed galaxy cluster before such structures were thought to be possible.

X-ray observations of the cluster revealed that it is made up of two galaxy clusters merging along our line of sight.

Researchers working with data from the South Pole Telescope have released a major catalog of galaxy clusters, giving ...

NASA's Chandra X-ray Observatory has released four stunning images of cosmic wonders, depicted in red, white and blue for the ...

The Bullet Cluster is considered important evidence for the existence of dark matter. Now a research team believes it can ...

A massive, spacetime-warping cluster of galaxies is the setting of today's NASA/ESA Hubble Space Telescope image. The galaxy cluster in question is Abell 209, located 2.8 billion light-years away in ...

Far beyond the Milky Way, vast collections of galaxies continue to drift, gather and occasionally collide. One such region ...

The Bullet Cluster of galaxies might only have half as much dark matter than scientists thought, or perhaps even none at all, ...

NASA is marking the United States' 250th birthday with four striking red, white, and blue images of deep space from the ...

What can heat distribution within galaxy clusters, which often consist of hundreds to thousands of galaxies, teach astronomers about their formation and evolution? This is what a recent study ...

Roughly 2.8 billion light-years from Earth, two galaxy clusters are engaged in a cosmic tussle. These enormous structures last collided about a billion years ago, but now, it appears they’re going ...