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Dual Interpretations: Milky Way's Outer Fringe of Stars Sparks Disagreement

It's well known that the Milky Way is a spiral galaxy, a swirl of stars in an extended, many-armed disk . But the structure of the galaxy is far from two-dimensional. Above and below those familiar spiral arms is a lesser-known feature, a spherical swarm of stars that makes up a halo around the disk. [More] ...

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Source: Scientific American - Wednesday, 22 February


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