The Milky Way could be flinging stars into its outer halo -- a movement triggered by powerful supernova explosions. Supernovas occur when stars explode and lose most of their mass.
원문출처 : https://www.cnn.com/2020/04/20/world/milky-way-stars-halo-intl-scli-scn/index.html
원문출처 : https://www.cnn.com/2020/04/20/world/milky-way-stars-halo-intl-scli-scn/index.html