4We Hang Out With Ancient Stars

The Milky Way is also surrounded by more than 150 ancient groups of stars, some of which are among the oldest in the universe.

Called globular clusters, these primordial stellar conglomerates live in the Milky Way’s halo and orbit the galactic center. Each is crammed with hundreds of thousands of stars. Also hanging around the Milky Way are dozens of satellite galaxies; most of these are tough to see, but the Small and Large Magellanic Clouds glisten each night in the southern sky.

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