NASA's Hubble Space Telescope captures the deepest image ever obtained of a galaxy cluster and enables new discoveries about the ancient universe.
This week NASA announced three new findings revealed by images from its Hubble Space Telescope: the deepest image ever obtained of a galaxy cluster, four super-bright galaxies as they appeared 13 billion years ago, and a sample of small galaxies previously too faint and distant to be seen, which are thought to be responsible for most of the stars we see in the skies today. Here are some of the images which made these discoveries possible.