New observations from NASA's Chandra X-ray Observatory and other telescopes have captured a rare cosmic event: Two galaxy ...

Abell S1063 is so massive that the light from distant galaxies bends around it, allowing it to act as a magnifying glass to ...

The early universe was a stressful place for galaxies. Globs of tens to hundreds of neighboring galaxies, called galaxy clusters, would share a communal pool of hot gas—but not without drama.

The cosmic community of Abell 1489 comes into focus in this image of the galaxy cluster taken by the Gemini Multi-Object Spectrograph on Gemini North, one half of the International Gemini Observatory.

Let's start with the galactic elephant in the room: the colossal galaxy cluster at the center of the image. The focal point of Webb's deep field image is a large, bright cluster of galaxies known ...

In fact, galaxies don’t just exist alone, but often interact with each other — and often come together in vast groups called galaxy clusters. This week’s image from the Hubble Space ...

Each coloured circle depicts a galaxy group or cluster. The richest galaxy clusters are marked in red; these are the richest galaxy clusters in the Hercules and Leo superclusters. The side panels ...

This image of the Christmas Tree Galaxy Cluster was made with data from the James Webb Space Telescope and the Hubble Space Telescope.Credit...NASA, ESA, CSA, STScI, J. Diego (Instituto de Física ...