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 ...

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

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

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

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 ...

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 ...

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 ...

A developing galaxy cluster dating to about 1 billion years after the Big Bang is shown in this handout image released on January 28, 2026. The white box marks the field of view of the Chandra X-ray ...

For decades, astronomers have pictured galaxies and their central black holes growing together. In the familiar story, a ...

The image features a galaxy cluster called CL0016+1609. Hubble captured an image of galaxy cluster CL0016+1609 to study its properties The cluster consists of two merging galaxy clusters seen along ...