An ''unusually calm and remote'' galaxy cluster was discovered 8.4 billion light-years away. (Sound like anyone you know?) Astronomers call it “relaxed,” meaning that it shows no signs of having been disrupted by violent collisions. https://go.nasa.gov/45cj0Af #NASAExoplanets
The discovery of the most distant galaxy cluster with a specific important trait is providing insight into how these gigantic structures formed and why the universe looks like it does in the present day.
FranIAm
in reply to NASA • • •