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Oldest Star in Universe

• arclein
HD 140283 is remarkable for the fact that it is almost entirely composed of hydrogen and helium. That may seem like a strange thing for a star to be remarkable for, but whereas most other stars are mainly hydrogen and helium, they also contain heavier elements, such as oxygen, carbon, neon and iron, equal to at least a few per cent of their mass. These heavier elements were all created in thecores of dying stars, and spread out in the universe when those dying stars exploded. Thus, this means that HD 1

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