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Gaia Finds Ancient Streams of Stars That Formed the Milky Way

Using ESA’s Gaia spacecraft, astronomers have tracked down two streams of stars that likely formed the foundation of the Milky Way. Named "Shakti and Shiva," the two streams contain about 10 million stars, all of which are 12 to 13 billion years old and likely came together even before the spiral arms and disk were formed.

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