Contact: Richard Lewis
Caption: Brown University physicists studied seven dwarf galaxies, circled in white (click to enlarge). Observations indicate the dwarf galaxies are full of dark matter because their stars' motion cannot be fully explained by their mass alone, making them ideal places to search for dark matter annihilation signals.
Credit: Koushiappas and Geringer-Sameth, Brown University
Usage Restrictions: None
Related news release: Physicists set strongest limit on mass of dark matter