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](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/02/022920_review.jpg?fit=1028%2C579&ssl=1)
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