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Astronomy

The Halo of the Milky Way and Its Stellar Streams

Quick fact

The Sagittarius dwarf galaxy is being torn apart by the Milky Way, and its stellar debris wraps around the entire galaxy in a loop that we've mapped across the sky.

Why this is interesting

The Milky Way is not just a flat pinwheel of stars—it's wrapped in a vast, ancient halo. Peering into that halo reveals glittering rivers of stars, remnants of galaxies that our own has devoured.