The Students Who Found the Oldest Star: Top Photos

Two undergrads walked into an observatory on their first night and found the oldest star anyone has ever seen.

Las Campanas Observatory.
Las Campanas Observatory, perched in the Chilean Andes. It was here that Hillary Andales, running preliminary numbers at a console, started making the small noises of disbelief that signaled something extraordinary in the data. © Krzysztof Ulaczyk (more work on Wikimedia Commons: Kszulogaleria), CC BY-SA 3.0, via Wikimedia Commons

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