Galaxy clusters are formed by a dense packing of many galaxies, making them the most massive structures in the universe.

Beehive cluster, a group of 1,000 stars, will be visible to stargazers in January. How to see it, what’s visible to naked eye ...

How could the Universe form such dense and extremely hot structures only 1.4 billion years after the Big Bang? This question ...

Scientists have detected a surprisingly hot galaxy cluster dating back to the universe’s infancy. The cluster formed far ...

The “Seven Sisters” of the Pleiades are part of a much larger complex that can help reveal our galaxy’s deep history ...

The galaxy cluster appears hotter and more mature than it should for its young age, challenging what we think we know about ...

Astronomers found a young galaxy cluster with unexpectedly hot gas, suggesting cosmic structures formed faster than once ...

Raise a toast to another orbit around the sun with a new NASA image of sparkling galaxy clusters fittingly dubbed the ...

Most astronomers agree that young galaxy clusters should be relatively cool compared to older ones. But researchers recently ...

An international team of astronomers led by Canadian researchers has found something the universe wasn't supposed to have: a ...

NPR's Short Wave talks about elephants' sniffing abilities, the remarkable migration of painted lady butterflies and a ...

Gas within the cluster, which existed merely 1.4 billion years after the Big Bang, is at least five times hotter than ...