When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Astronomers have found what they are calling the perfect cosmic storm, a galaxy cluster pile-up ...

Can you build a “safe” cluster bomb? That is the question facing military chiefs after a treaty banning the weapons was agreed by 109 countries in Dublin, Ireland, last week. Cluster bombs scatter ...

This image of Abell 2744 is the first to come from Hubble's Frontier Fields observing program, which is using the magnifying power of enormous galaxy clusters to peer deep into the distant universe.

This awesome image shows the collision of several galaxy clusters, each with hundreds of galaxies inside, taking place 4 billion light-years away. The rest of this article is behind a paywall. Please ...