Abell 1775: Chandra catches slingshot during collision

When the titans of space—galaxy clusters—collide, extraordinary things can happen. A new study using NASA's Chandra X-ray Observatory examines the repercussions after two galaxy clusters clashed.

Galaxy cluster Abell 3158 inspected in X-rays

Astronomers from the University of Bonn, Germany and elsewhere have used the eROSITA telescope onboard the Spektrum-Roentgen-Gamma (SRG) mission to perform X-rays observations of a nearby galaxy cluster known as Abell 3158. ...

Image: Hubble gazes at a cluster full of cosmic clues

This detailed image features Abell 3827, a galaxy cluster that offers a wealth of exciting possibilities for study. Hubble observed it in order to study dark matter, which is one of the greatest puzzles cosmologists face ...

A new window to see hidden side of magnetized universe

New observations and simulations show that jets of high-energy particles emitted from the central massive black hole in the brightest galaxy in galaxy clusters can be used to map the structure of invisible inter-cluster magnetic ...

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Galaxy groups and clusters

Galaxy groups and clusters are the largest known gravitationally bound objects to have arisen thus far in the process of cosmic structure formation. They form the densest part of the large scale structure of the universe. In models for the gravitational formation of structure with cold dark matter, the smallest structures collapse first and eventually build the largest structures, clusters of galaxies. Clusters are then formed relatively recently between 10 billion years ago and now. Groups and clusters may contain from ten to thousands of galaxies. The clusters themselves are often associated with larger groups called superclusters.

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