Astronomers have spotted a mysteriously mature “baby cluster” of galaxies in the early universe, scarcely a billion years after the big bang. Although not a full-grown, full-blown galaxy cluster, the ...

UBC scientists have discovered hot gas in a 12-billion-year-old galaxy cluster, shedding light on galaxy clusters in the ...

Long strands of glowing gas stretch behind a distant galaxy, dotted with pockets of newborn stars. The shape looks almost ...

New multiscale simulations help crack long-standing mysteries behind the enormous radio arcs generated when galaxy clusters collide. When you purchase through links on our site, we may earn an ...

Astronomers have explained how a galaxy cluster maintains its heat, despite emitting X-rays that cool the hot gas at its center. The group discovered the existence of a fast-moving, high-temperature ...

Celebrate the New Year with the “Champagne Cluster,” a galaxy cluster seen in this new image from NASA’s Chandra X-ray Observatory and optical telescopes. Astronomers discovered this galaxy cluster ...

ESA’s XMM-Newton X-ray observatory has revealed three massive filaments of hot gas flowing towards a cluster of galaxies, uncovering a portion of the cosmic skeleton that pervades the entire Universe.

Light takes time to travel through space. Because of this, the light we see from distant objects in the night sky represents what they looked like when they released this light, not necessarily what ...

The Perseus cluster is a vast swirl of thousands of galaxies, all bound together by gravity. Famed for its unbelievable size — containing the mass of some 600 trillion suns — it also has a reputation ...

The XRISM science team, including members of Nagoya University, has explained how galaxy clusters maintain their heat despite emitting X-rays, which typically have a cooling effect on the hot gas. By ...