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.

Astronomers discover the earliest, hottest galaxy cluster in the universe, and it breaks all the rules

Source: space
Source Link: https://www.space.com/astronomy/galaxies/astronomers-discover-the-earliest-hottest-galaxy-cluster-in-the-universe-and-it-breaks-all-the-rules