How a Dwarf Galaxy Shook the Milky Way ⚡ экспресс
Original: "Galactic seismology: can a disc-crossing impulse explain the large-scale perturbations in the Milky Way's disc?"
One massive collision explains the spirals and the disk warp, but unexplained waves hint at other impacts.
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About a billion years ago, a dwarf galaxy crashed into the Milky Way’s disk — and our Galaxy still bears the scar: its warp and spiral arms may have been born from that very impact.
🎯 The Sagittarius dwarf galaxy is still visible in the sky as a faint ribbon of stars, stretched thin by the Milky Way's gravity.