Galaxy clusters are formed by a dense packing of many galaxies, making them the most massive structures in the universe.

The powerful space telescope was able to see three clusters of galaxies in the region, also known as Abell 2744, merging to form a "mega cluster." When you purchase through links on our site, we may ...

Globular clusters maintain their structural integrity primarily due to the angular momentum of their constituent stars, preventing gravitational collapse towards the cluster's center of mass. While ...