https://www.universetoday.com/157868/a-dwarf-galaxy-passed-close-to-the-milky-way-and-left-ripples-in-its-wake/
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9/30/22 at 6:28am
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Universe Today
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Brian Koberlein
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An ancient collison with the Milky Way is still causing ripples in our galaxy according to Gaia data.
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