UBV system

The UBV system is a method astronomers use to classify and analyze stars based on their brightness in three specific parts of the visible light spectrum: ultraviolet (U), blue (B), and visible (V). By measuring how much light a star emits in each of these colors, scientists can determine its temperature, age, and composition. The system helps compare stars consistently and understand their properties more precisely, functioning as a standardized way to study and categorize stars across the universe.