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This image of the galaxy cluster Abell 520 — 2.4 billion light-years away — may challenge some of our basic theories about Dark Matter. It is overlaid with false-color maps showing concentrations of starlight (orange), hot gas (green) and mass (blue). The mass is mostly Dark Matter.
M.J. Jee and A. Mahdavi/NASA/ESA/CFHT/CXO
March 13, 2012 The things we can see in the universe are moving faster than they should be. Why? Is the answer Dark Matter, or a physics we're not yet aware of? Science has made its choice. Only time will tell if the consensus was correct.
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