The galaxy clusters involved in this scuffle are part of a larger system—a “combined” galaxy cluster—called PSZ2 G181. In a ...

Separated by a distance of around 11 million light-years, these structures are thought to be "shock fronts" resulting from ...

New observations from NASA's Chandra X-ray Observatory and other telescopes have captured a rare cosmic event: Two galaxy ...

New observations from NASA's Chandra X-ray Observatory and other telescopes have captured a rare cosmic event: two galaxy ...

Despite their enormous distance, the galaxy clusters are gravitationally bound and slowly turning back for another high-speed ...

Galaxy clusters are among the largest structures in the universe, consisting of hundreds or thousands of galaxies.

In an extraordinary discovery, astronomers using NASA’s Chandra X-ray Observatory and other telescopes have found evidence ...