stellar classification
Stellar classification is a system used by astronomers to categorize stars based on their temperature, color, and spectral characteristics. The main classes are designated by letters: O, B, A, F, G, K, and M, with O stars being the hottest and M stars being the coolest. Each class is further divided into subclasses using numbers.
This classification helps scientists understand the life cycle of stars and their physical properties. For example, G class stars, like our Sun, are medium-temperature stars that can support life on surrounding planets. Understanding stellar classification is essential for studying the universe.