Maggie McKee in New Scientist:
The most distant cluster of galaxies ever found has been revealed by astronomers – and it bears an uncanny resemblance to those nearby. The technique used to discover the cluster promises further discoveries at similar distances, which would help constrain cosmological models.
The cluster of galaxies spotted by astronomers lies 9 billion light-years away. That beats the 8.5 billion light-years’ distance of the previous record holder – a jump that represents a “significant fraction of a galaxy’s lifespan”, says Christopher Mullis, at the University of Michigan in Ann Arbor, US, who led the team.