Cool and hot stars

Cool stars and hot stars primarily differ in surface temperature, which influences their color and brightness. Hot stars have higher temperatures, often exceeding 10,000°C, emitting a blue or blue-white glow and shining brightly. Cool stars are cooler, typically below 5,000°C, appearing red or orange and appearing less luminous. The temperature affects their size, lifespan, and the types of elements they produce. For example, hot stars tend to be larger and burn brighter but shorter lives, while cooler stars can be smaller, longer-lived, and often more stable.