Astrophysicists have used AI to reconstruct the first complete family tree of the Milky Way — and discover perhaps the biggest collision in the galaxy’s history. The researchers unraveled these mysteries by analyzing the globular clusters that orbit our galaxy. These clusters can contain up to a million ancient stars. The Milky Way hosts over 150 of them, many of which were formed in smaller galaxies before merging to shape our own. “The main challenge of connecting the properties of globular clusters to the merger history of their host galaxy has always been that galaxy assembly is an extremely messy process, during…

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