Explore the wonders of observational astrophysics with Dufay’s “Introduction to Astrophysics: The Stars.” This accessible text bridges introductory and advanced concepts, delving into stellar photometry, spectroscopy, and classification. Learn about Hertzsprung-Russell diagrams, stellar evolution, and the intricacies of stellar atmospheres. Perfect for physics students, professionals, and astronomy enthusiasts seeking a deeper understanding of the cosmos.