A stunningly concentrated and hefty galaxy cluster, from a time in the universe's history when such massive structures aren't ...

This NASA Hubble Space Telescope image features a galaxy cluster called CL0016+1609, or MACS J0018.5+1626, that is very ...

X-ray observations of the cluster revealed that it is made up of two galaxy clusters merging along our line of sight.

The James Webb Space Telescope observed 13-billion-year-old light, using a closer galactic cluster like a magnifying glass.

James Webb Space Telescope has delivered stunning views of the "gravitationally distorted realms" of the El Gordo galaxy ...

Galaxy cluster cosmology results from eROSITA’s X-ray all-sky survey deliver the most precise late-universe measurement of matter density and clumpiness ever achieved from galaxy clusters, easing the ...

Because Terzan 5 resembles a chunk of the material that helped build the Milky Way’s central bulge, the research team is now ...

A new Hubble image offers a detailed look at Messier 88, a spiral galaxy in the Virgo Cluster whose core is powered by a ...

Roughly 2.8 billion light-years from Earth, two galaxy clusters are engaged in a cosmic tussle. These enormous structures last collided about a billion years ago, but now, it appears they’re going ...

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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 show ...