Cecilia Payne-Gaposchkin revealed stars’ composition and broke gender barriers

‘What Stars Are Made Of’ celebrates the life of a pioneering astronomer

Cecilia Payne-Gaposchkin

Cecilia Payne-Gaposchkin, seen at her desk at Harvard College Observatory, discovered that stars are made of mostly hydrogen and helium.

Smithsonian Institution Archives/Wikimedia Commons

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