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What happened to the Milky Way’s sister galaxy?

Cosmic cannibalism, or the merging of small galaxies with larger ones, happens all over the universe. We now know that the Milky Way lost a sister galaxy to Andromeda, and we’re now a step closer to understanding what might ultimately happen when Andromeda comes for us.

Beyond astro-ph

Astronomy beyond the research

Navigating careers in astronomy

Career advice

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