A distant cluster of galaxies is wrapped in a vast halo of high-energy particles that could be the work of supermassive black holes or a cosmic particle accelerator.

Astronomers detect 10 billion-year-old radio waves from a distant galaxy cluster SpARCS1049, revealing a mini-halo that suggests black holes or cosmic collisions energize galaxies.

Space Astronomers stumble upon ancient radio signals from distant galaxy cluster By Nick Butler, Fox News Published June 29, 2025, 8:51 p.m. ET ...

A groundbreaking discovery, recently detailed in The Astrophysical Journal Letters, has unveiled a “mini halo” surrounding one of the most distant galaxy clusters observed to date. This mini ...

Galaxy cluster Abell 1489, as imaged by the International Gemini Observatory, contains more than 200 of the gravitationally-bound systems of stars, stellar remnants, interstellar gas and dust.

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 ...

The cluster, called SPT-CL J2215-3537 (SPT2215 for short), lies 8.4 billion light-years away and is thus seen as it was when the universe, now 13.8 billion years old, was just 5.3 billion years old.

A rare discovery of a "relaxed" galaxy cluster that may have formed close to 8 billion years ago could unveil new clues about the big bang.

Correction (August 25, 2023): The story previously stated that the Coma Cluster is a single galaxy, when it is in fact a cluster of almost 1,000 galaxies.

In addition to a large telescope, to successfully view this galaxy cluster you’ll need to use eyepieces that give magnifications of 250x and more. High powers will increase the contrast between ...