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.

Astonishing 'halo' of high-energy particles around giant galaxy cluster is a glimpse into the early universe

Source: space
Source Link: https://www.space.com/astronomy/galaxies/astonishing-halo-of-high-energy-particles-around-giant-galaxy-cluster-is-a-glimpse-into-the-early-universe