Dark Matter Theories Challenged By Satellite Galaxy Discovery

Dark Matter Theories Challenged By Satellite Galaxy Discovery

A sprawling collection of galaxies and star clusters surrounding our own Milky Way is challenging long-standing theories on the existence of dark matter, the mysterious substance thought to pervade the universe. The structure of satellite galaxies and star clusters around the Milky Way is so vast that it reaches across a million light-years – 10 times as wide as the Milky Way itself, according to astronomers at the University of Bonn in Germany, who made the discovery. Existing dark matter theories fail to explain the arrangement of these cosmic objects, the scientists say.