**Who is celebrated for her contributions to the field of astronomy?**
Cecilia Payne-Gaposchkin is celebrated for her groundbreaking contributions to the field of astronomy. In 1925, she proposed that stars are primarily composed of hydrogen and helium, a revolutionary idea that changed the understanding of stellar composition. Despite facing skepticism due to her gender, her research laid the foundation for modern astrophysics. Payne-Gaposchkin's work not only advanced the study of the universe but also opened doors for future generations of female astronomers. Her accomplishments highlight the importance of diversity in scientific fields and inspire ongoing efforts to encourage women’s involvement in science and technology disciplines.