Astronomers discover dizzying spin of the Milky Way galaxy's 'halo'. This new knowledge sheds light on how individual atoms have assembled into stars, planets, and galaxies like our own, and what the future holds for these galaxies.

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Astronomers discover dizzying spin of the Milky Way galaxy's 'halo'. This new knowledge sheds light on how individual atoms have assembled into stars, planets, and galaxies like our own, and what the future holds for these galaxies.