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| Description: Galaxies Forming by Combining Smaller Units (b) Using the Hubble and Keck telescopes, astronomers discovered two groups of stars (arrows) 13.4 billion ly away that are believed to be protogalaxies from which bigger galaxies grew. These protogalaxies were discovered because they were enlarged by the gravitational lensing of an intervening cluster of galaxies Picture Stats: Views: 642 Filesize: 282.88kB Height: 900 Width: 1244 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18792 |