Study of galaxy Segue 1 suggests it may be a fossil from the early universe

(Phys.org) —A trio of space researchers studying the galaxy Segue 1 has found that its red giant stars are made mostly of hydrogen and helium, with very few heavy elements, suggesting the galaxy stopped evolving not long after its formation. In their paper uploaded to the preprint sever arXiv (and soon to be published in Astrophysical Journal) the team describes observation data they've obtained regarding the galaxy and why what they've found might mean Segue 1 is the oldest observable galaxy in the night sky.

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