Hubble Atlas of Ancient Galaxies
Date: 30 November 1992
Satellite: Hubble Space Telescope
Copyright: Alan Dressier, Carnegie Institution, and NASA Co-investigators: Augustus Oemler (Yale Urnversfty), James E. Gunn (Princeton Universfty), Harvey Butcher (the Netherlands Foundation for Research in Astronomy)
Hubble Space Telescope's high resolution allows astronomers to classify galaxies in a cluster (CL 0939+4713) that existed four billion years ago, when the universe was two- thirds of its present age.
Last Update: 1 September 2019