Astronomers using computer simulations have investigated whether a class of star clusters nicknamed "cosmic wallflowers" ...

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

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

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

Scale in the universe is hard to understand from a purely human perspective. Many times, the math just doesn't sit well with ...

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

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

The Champagne Cluster is a rare and beautiful example of two galaxy clusters smashing together. Its festive name comes from both its New Year’s Eve discovery and its bubbly appearance in space. Images ...

Astronomers studying a distant galaxy cluster stumbled upon ancient radio signals that might hold clues to the formation of the early universe. While studying the distant galaxy cluster known as ...

Astronomers have discovered a ghostly, million-light-year-long bridge of stars connecting two massive galaxies within the Abell 3667 cluster, 700 million light-years away. This glowing thread of ...

In honor of the Fourth of July, NASA has released a patriotic collection of images that also comes with data-centered audio ...