The American Physical Society is a nonprofit membership organization working to advance physics by fostering a vibrant, inclusive, and global community dedicated to science and society.
![Cecilia Payne-Gaposchkin discovered that stars are mostly made of hydrogen](https://img.easybranches.com/uploads/news/2024/09/14764882.jpg)
Have you ever wondered why stars shine? When you gaze up at the night sky and observe the twinkling shapes, or bask in the warmth of the sun on a hot afternoon, have you pondered the source of that l… [+9593 chars]