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Inverse
Inverse
Science
Rahul Rao

What Created The Milky Way’s Mysterious Bar? A Galactic Collision, Maybe

— Xinhua News Agency/Getty Images

Sometime between 8 and 11 billion years ago, the Milky Way crashed into a dwarf galaxy that astronomers call the Gaia Sausage. You will not see the Gaia Sausage today. As far as astronomers know, its remnants largely take the form of a handful of globular clusters — clumps of old stars floating in the Milky Way’s outskirts.

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