The theory emerged in 1937 when Swiss astronomer Fritz Zwicky noticed that the Coma Cluster galaxies behaved as if they were under the influence of vast amounts of unobservable "dark" matter. This ...

The Coma Cluster is a particularly rich cluster that contains more than a thousand known galaxies. Amateur astronomers can easily spot several of these in a backyard telescope (such as Caldwell 35).

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA), along with complementary data from the Atacama Pathfinder Experiment (APEX), have discovered a surprisingly large reservoir ...

Scientists observing the Centaurus galaxy cluster made an exciting breakthrough by discovering powerful streams of hot gas ...

Arp 273: This image of a pair of interacting galaxies called Arp 273 was released to celebrate the 21st anniversary of the launch of the Hubble Space Telescope. The Penguin and the Egg: This image ...

Scientists have finally solved a long-standing mystery: why do galaxy clusters stay hot? Thanks to a new discovery from the ...

XRISM has uncovered how galaxy clusters evolve—violent mergers create turbulence, preventing hot gas from cooling. This ...

This artist's impression of the 'quenching' process shows how a normal blue (star-forming) galaxy lost its gas while falling into the Coma Cluster very early on in its formation. Disclaimer ...

it is approximately 390 million light-years from Earth and inside the Coma galaxy cluster. The interaction in these galaxies led to a disorderly entangled mess of stars, gas, and dust: a common ...

Scientists used XRISM to detect hot gas flows in Centaurus Cluster, proving that galaxy collisions cause gas movement and ...

Galaxies are the building blocks of the universe. Clusters of galaxies, and clusters of clusters of galaxies, called superclusters, make up the structures in the geography of the universe.