UC Riverside Astronomers Find Faintest and Most Numerous Galaxies in the Early Universe

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Color Image of the Massive Galaxy Cluster, Abell 1689.

Anahita Alavi, a grad student in the Department of Physics and Astronomy working with Prof. Brian Siana, has found a large population of extremely faint galaxies that had an important role in the evolution of the early universe.  The team used the Hubble Space Telescope to take the deepest images ever obtained in the ultraviolet.  They chose to image a massive galaxy cluster called Abell 1689, whose gravity acts as a lens and magnifies background galaxies.  The Keck Observatory was also used to confirm the distances to the galaxies. (Press release)