Abell 2255 is a cluster containing between 300 and 500 constituent galaxies, many of which are merging. It's located around ...

NASA's James Webb Space Telescope (JWST) has produced a new image of the Bullet Cluster, which is a titanic collision between ...

This unprecedented view of the Bullet Cluster provided by the James Webb Space Telescope and the Chandra X-ray Observatory ...

Astronomers have studied the globular cluster 47 Tucanae extensively, but still have many questions. It may have an ...

Views of a massive galaxy cluster Abell 2256 have been captured by NASA’s Chandra X-ray Observatory, ESA’s XMM-Newton and ...

Some of these open clusters are pretty famous, such as the Pleiades cluster, also known as the Seven Sisters. This is ...

A new study finds that galaxy clusters — cosmic cities packed with thousands of galaxies — trace invisible highways of dark ...

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

A team led by the Italian National Institute for Astrophysics discovered the most distant known fossil galaxy — a relic of ...

The cloud around it is nearly a whopping 20 million light-years across—about 20 times the diameter of our Milky Way galaxy—beating the previous record holder, seen around cluster Abell 2255 ...

Two studies fill in gaps about the cosmos’s ordinary matter. One maps it all, even the “missing matter.” The other details one of its hiding spots.

Astronomy Chandra galaxies NASA. Daily Newsletter. Get the best tech, ... The galaxy clusters involved in this scuffle are part of a larger system—a “combined” galaxy cluster—called PSZ2 G181.