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Galaxies Full of Dark Matter
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Galaxies Full of Dark Matter

January 11, 2013
A view of the universe from NASA's Fermi Gamma-ray Space Telescope. National Science Foundation (NSF)-supported physicists from Brown University studied seven dwarf galaxies, circled in white. Observations indicate those galaxies are full of dark matter because their stars' motion cannot be explained by their mass alone, making them ideal places to search for dark matter annihilation signals. To learn more about this research, see the Brown University news story http://nsf.gov/discoveries/disc_summ.jsp?cntn_id=121535&org=NSF'>Physicists set strongest limit on mass of dark matter. [Research supported by NSF grant PHY 09-69853.] (Date of Image: November 2011) Credit: NASA/DOE/Fermi-LAT Collaboration/Koushiappas and Geringer-Sameth, Brown University