The Perseus Cluster of galaxies that I discussed in my last column (Nov. 24), is not an isolated entity. In fact, it occupies the eastern edge of an archipelago of galaxies and clusters of galaxies ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Gemini North's image of ...

The galaxy cluster is filled with bubbles blown into X-ray emitting gas, producing some of the deepest sounds ever heard. When you purchase through links on our site, we may earn an affiliate ...