Galaxies In Dense Environments Tend To Be Larger, Settling One Cosmic Question And Raising Others

A new study has found that galaxies in denser environments tend to be larger than those in less dense regions, challenging current theories of galaxy formation and evolution. Researchers used a machine-learning tool to analyze millions of galaxies and found that clustered galaxies are up to 25% larger than their counterparts. This raises questions about how galaxies evolve over time and highlights the need to modify existing theories.