Where does our galaxy come from?
It’s one of the biggest questions in cosmology and yet only now are astronomers beginning to unravel the mysterious mergers that resulted in the Milky Way.
The first complete family tree of our home galaxy has been reconstructed by an international team of astrophysicists. They used artificial intelligence to decipher the movements of the 150 globular clusters that orbit the Milky Way.
In doing so they’re uncovered a massive collision billions of years ago between our galaxy and what they’ve dubbed the “Kraken” galaxy, an event that added millions of stars to the Milky Way.
It’s thought that globular clusters—dense clumps of stars older than most in the Milky Way and related to each other—are the