Scientists think they may have found the remains of an entire galaxy that the Milky Way absorbed billions of years ago — 20 unusual stars hiding inside our own galactic disk, possibly the leftovers of a small galaxy our own home swallowed when it was still young

The Milky Way, by every available measurement of how large galaxies actually develop, is a particular kind of cosmic predator. The galaxy reached its current form not through the slow ordinary growth of a single isolated system but through a succession of mergers with smaller neighboring galaxies, each of which was, on the available evidence, [...] The post Scientists think they may have found the remains of an entire galaxy that the Milky Way absorbed billions of years ago — 20 unusual stars hi