The Hidden History of the Milky Way: A Galactic Collision Revealed The discovery that the Milky Way was flipped on its side by a collision with a dwarf galaxy 10 billion years ago has sent shockwaves through the astronomy community.
This cataclysmic event reshaped the galaxy's structure, leaving behind a lasting impact. The Gaia Sausage, a massive object containing over 10 billion times the mass of the sun, was involved in this collision.
To put its enormous scale into perspective, consider that our solar system is just a tiny fraction of the galaxy's total mass.