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Blue photons are higher-energy than red photons. The equations governing the emission of light based solely on temperature state that an object giving off primarily blue light is hotter than one giving off primarily red light.

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Q: Why are the hottest stars blue and the coldest stars red?
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What are the colors of the stars coldest to hottest?

White, blue, red, orange, from hottest to coldest


What color are the hottest and the coldest stars?

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