Painting Galaxy Clusters by Numbers (and Physics)

Galaxy clusters are the most massive objects in the universe held together by gravity, containing up to several thousand individual galaxies and huge reservoirs of superheated, X-ray-emitting gas. The mass of this hot gas is typically about five times higher than the total mass of all the galaxies in galaxy clusters. In addition to these […]

December 09, 2025
from NASA https://ift.tt/TBuyJ2h