How do galaxies evolve? What was the formation history of the Milky Way? How can we tell? What do we know about the younger years of the Milky Way?

There are many billions of galaxies like the Milky Way in the Universe. Realizing this, we may not be in such a special galaxy after all. But it is the one we know best, as we can study it in much more detail than any other in the Universe.

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