NASA's 'Dark Matter' Probe: "Our Milky Way Galaxy is Embedded Within a Vast Sphere of Black Holes"

NASA's 'Dark Matter' Probe: "Our Milky Way Galaxy is Embedded Within a Vast Sphere of Black Holes" (Weekend Feature) - The Daily Galaxy --Great Discoveries Channel: ""All galaxies, including our own, are embedded within a vast sphere of black holes each about 30 times the sun's mass," says Alexander Kashlinsky, an astrophysicist at NASA's Goddard Space Flight Center."