COSMOS-AzTEC3, is the most distant known massive "proto-cluster"
of galaxies, lying about 12.6 billion light-years away from Earth.
Image credit: Subaru/NASA/JPL-Caltech
Astronomers have uncovered a burgeoning galactic metropolis, the most distant known in the early universe. This ancient collection of galaxies presumably grew into a modern galaxy cluster similar to the massive ones seen today.
The developing cluster, named COSMOS-AzTEC3, was discovered and characterized by multi-wavelength telescopes, including NASA's Spitzer, Chandra and Hubble space telescopes, and the ground-based W.M. Keck Observatory and Japan's Subaru Telescope.(read more)