Astronomers using the NASA/ESA Hubble Space Telescope have found definitive evidence that the young Milky Way swallowed a dwarf galaxy just two billion years after the Big Bang, revealing one of the earliest major mergers in the history of our Galaxy. About 11.8 billion years ago, a dwarf galaxy known as LKH merged with the early Milky Way. Image credit: NASA / ESA / Joseph Olmsted, STScI. The Milky Way today is a massive spiral galaxy home to hundreds...
