The Hubble telescope captured a whole swarm of bright firefly-like galaxies. Here is the rich galactic cluster Abell 2163. It is part of the Abell catalog, which has more than 4,000 galactic clusters. It was possible to study the concrete formation especially well, because the material near the nucleus is endowed with interesting characteristics, including a large and bright radio halo, an unusually high temperature index and a significant level of X-ray radiation.
This is the hottest cluster in the catalog. Observing such formations will help to better understand dark matter and take a fresh look at the distant Universe through gravitational lensing.
For the photo, a wide-angle camera 3 was used as part of the RELICS program - the study of 41 massive galactic clusters to find the brightest among the most distant ones. Later they will be examined by the telescope of James Webb.