Stellar Motions in Outer Halo Shed New Light on Milky Way Evolution

By Donna Weaver | Space Telescope Science Institute on Feb 22, 2013   Science/Education  

Peering deep into the vast stellar halo that envelops our Milky Way galaxy, astronomers using NASA's Hubble Space Telescope have uncovered tantalizing evidence for the possible existence of a shell of stars that are a relic of cannibalism by our Milky Way.