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938 Astronomers reconstruct a galaxy’s 12-billion-year history using chemical clues

ScienceDaily
ScienceDaily · 03/23/2026 22:46 EDT

For the first time, scientists have reconstructed the full history of a galaxy outside the Milky Way using chemical clues. By analyzing oxygen across NGC 1365 and comparing it with simulations, they traced its growth over 12 billion years. The findings show how its core formed early while its outer regions were built through repeated mergers. This new approach could transform how astronomers study galaxy evolution.

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