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Milky Way's disk grew 'upside down,' with younger stars forming in ever-thinner layers
The Milky Way is home to hundreds of billions of stars arranged in a glorious spiral pattern. But beyond the obvious spiral, our galaxy has other physical characteristics.
AI Summary
The Milky Way consists of a central bulge, a surrounding disk and an outer halo. The disk itself is split into a thin disk and a thick disk, which differ not only in structure but also in the characteristics of their stellar populations.
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