If astronomers discovered another region with very old stars, extremely low metallicity, and stars moving in chaotic orbits, which hypothesis would be best supported?

Very old stars with extremely low metallicity formed early, when the gas available to make stars contained few elements heavier than hydrogen and helium. Chaotic orbits also suggest the region did not form as an orderly part of a young spiral arm. Together, these clues best support the idea that it is a remnant of an ancient interaction or collapse event.

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