The galaxy cluster appears hotter and more mature than it should for its young age, challenging what we think we know about how these cities of galaxies form.

This NASA/ESA/CSA James Webb Space Telescope Picture of the Month brings us a scene from the distant universe. Pictured here ...

To explain these observations, they proposed a new kind of energy that is responsible for driving the universe’s accelerated expansion: dark energy. Astrophysicists now believe dark energy makes up ...

Observations of the thermal energy in a baby galaxy cluster 12.4 billion light years away suggest much more energetic early cluster growth than current theories assume ...

A newly discovered galaxy cluster, blazing with unexpectedly hot gas just 1.4 billion years after the Big Bang, is forcing scientists to rethink the early universe. The research, published in Nature, ...

Researchers at the University of British Columbia and Dalhousie University have found a young galaxy cluster that appears far ...

Astronomers Discover Galaxy Cluster Burning 5X Hotter Than Expected ...

Astronomers have discovered a vast, dense cluster of massive galaxies just 1 billion years after the Big Bang, each forming ...

New Hubble observations explain how blue straggler stars form, showing that binary systems in low-density clusters play a key role ...

A new study finds that galaxy clusters — cosmic cities packed with thousands of galaxies — trace invisible highways of dark matter stretching up to a billion light years across the universe. Even more ...

New model shows extremely massive stars, over 1,000 solar masses, shaped the birth and early evolution of the universe's oldest star clusters. (Nanowerk News) An international team led by ICREA ...

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