How Cecilia Payne-Gaposchkin Changed What We Know About Stars
For thousands of years, people looked up at the stars, tracking their paths and weaving them into stories. But it wasn’t until the 1920s that a young woman named Cecilia Payne-Gaposchkin figured out what stars are really made of. Her discovery—that stars are mostly hydrogen and helium—turned astronomy upside down. For years, she didn’t get…