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A Clash of Clusters Provides New Clue to Dark Matter

Galaxy Cluster MACS J0025.4-1222
This clash of clusters provides striking evidence for dark matter and insight into its properties.

There is much to learn about the universe, and much of it centers on understanding dark matter. However, with this composite image, made using data from the Hubble Space Telescope Chandra X-Ray Observatory, researchers have discovered clues to increase our knowledge of dark matter. This image is a powerful collision of clusters. These clusters show formations of dark matter, where it separated from the ordinary matter. The different color disparities, along with the interesting evidence for dark matter brings us to the pick for 2008.