Hubble Spots Farthest Primordial Galaxy Cluster
Astronomers have discovered the most distant developing galaxy cluster known to date, shedding light on the formation of large-scale structure in the early universe. Researchers used NASA’s Hubble Space Telescope to find five tiny but bright galaxies clustered together 13.1 billion light-years from Earth. That means Hubble is observing them as they existed just 600 million years after the Big Bang, the dramatic event that brought our universe into existence, and the discovery offers a rare chance to observe ancient protoclusters, which are dim and widely scattered across the sky.