When we gaze at the night sky, the stars dazzle us with a variety of colors — from faint reds to brilliant blues. But these hues are far more than just celestial decoration. In fact, a star’s color reveals its surface temperature, acting as a natural thermometer written in light.
Interestingly, this cosmic rule runs opposite to what we experience on Earth: red stars are cooler, while blue stars are far hotter. Understanding why comes down to the physics of blackbody radiation — and offers fascinating insights into stellar life cycles and the dynamic processes of the universe.
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