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Milky Way May Have Tilted for Billions of Years Due to Ancient Galaxy Collisions

Simulations by astronomers at Durham University suggest that the Milky Way's spiral disc gradually tilted within its dark matter halo over billions of years due to ancient collisions with smaller galaxies. The findings indicate the 13.6-billion-year-old galaxy had a far more turbulent history than previously thought, potentially explaining some of its puzzling structural features.