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 ...

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 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 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.

The NASA/ESA Hubble Space Telescope has unveiled a stunning image of the Abell 209 galaxy cluster, located 2.8 billion light-years away in the constellation Cetus. This massive cluster, comprising ...

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.

Using the Very Large Array (VLA), astronomers have performed radio observations of a galaxy cluster Abell 2744, nicknamed Pandora's Cluster. As a result, they obtained the deepest high-resolution ...

More information: Davide Tornotti et al, High-definition imaging of a filamentary connection between a close quasar pair at z = 3, Nature Astronomy (2025). DOI: 10.1038/s41550-024-02463-w.

Researchers compiled hundreds of astronomical observations into a high-definition image of a cosmic filament, part of the megastructure that undergirds the universe’s matter. The filament ...

The center of the galaxy cluster Abell 3322, as seen by Hubble. Image: ESA/Hubble & NASA, H. Ebeling The Hubble Space Telescope is no spring chicken, having operated in space for over 30 years.

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.