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 ...

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 ...

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.

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.

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.

The jellyfish galaxy JW39 hangs serenely in this image from the NASA/ESA Hubble Space Telescope. This galaxy lies over 900 million light-years away in the constellation Coma Berenices and is one ...

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.

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 ...