Young Galaxy Cluster

Summary

NASA’s James Webb Space Telescope takes us 4.4 billion years in the past with this July 3, 2026, image of a young galaxy cluster, MACS J0553.4-3342. The cluster is composed of two actively merging sub-clusters, roughly equal in mass. Each sub-cluster is anchored on an immensely bright and massive elliptical galaxy, easily identifiable as the […]