Stellar Motions in Milky Way’s Outer Halo Shed New Light on Galaxy EvolutionStellar Motions in Milky Way’s Outer Halo Shed New Light on Galaxy Evolution
<p>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