Galaxy Cluster

Courtesy NASA

A team led by a CU-Bulder astronomer has discovered the earliest and most distant developing galaxy cluster ever. Image courtesy NASA, ESA, M. Trenti (University of Colorado Boulder and Institute of Astronomy, University of Cambridge, U.K.), L. Bradley (Space Telescope Science Institute, Baltimore), and the BoRG team

The orbiting Hubble Space Telescope was serviced for the fourth and final time by NASA astronauts in 2009. Image courtesy NASA

NASa's Hubble Space Telescope, which is carrying an instrument designed by CU-Boulder, has been used to make thousands of important astronomical discoveries in the past two decades. Image courtesy NASA