star classification

Star classification is a system used by astronomers to categorize stars based on their temperature, color, size, and brightness. The most common classification system uses letters O, B, A, F, G, K, and M, which range from the hottest and bluest stars (O) to the coolest and reddest ones (M). Each letter is further divided into numbers to provide more specific details. This system helps scientists understand the characteristics and life cycles of stars, influencing our knowledge of the universe and how stars evolve over time.