Ejnar Hertzsprung

Ejnar Hertzsprung was a Danish astronomer known for his contributions to understanding stars and their properties. He is best remembered for the Hertzsprung-Russell diagram, which plots stars based on their brightness and temperature. This groundbreaking chart helps classify stars and reveals their evolutionary stages, showing how they change over time. Hertzsprung's work laid the foundation for modern astrophysics, enhancing our knowledge of the life cycle of stars, from their formation to their eventual demise. His research significantly advanced the field of astronomy in the early 20th century.