Oldest stars in Milky Way Galaxy appear to be captured parts of other galaxies

The stellar halo of the Milky Way contains older stars astronomers believe were captured during a collision with another galaxy about 5 billion years in the Milky Way's past

Astronomers studying the oldest stars in the Milky Way Galaxy think that the most ancient stars in the Milky Way Galaxy could be parts of other galaxies that have been transferred or captured by the Milky Way Galaxy during gigantic coll...