Contact: Gertie Skaarup
University of Copenhagen
Caption: Researchers have analyzed measurements of the light from galaxies in approximately 8,000 galaxy clusters. Galaxy clusters are accumulations of thousands of galaxies (every light in the image is a galaxy), which are held together by their own gravity. This gravity affects the light that is sent out into space from the galaxies.
Credit: Hubble Space Telescope
Usage Restrictions: Hubble Space Telescope
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