Why Are Stars Different Colors?

Stars come in different colors because they're like giant fireplaces, some burn hot and bright, like blue flames, while others burn cooler and give off a more orange or red glow. The hotter the star, the bluer it looks; the cooler it is, the redder it appears. It's kind of like how a campfire glows orange when it’s low but burns white-hot at its peak.

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Examples

A blue star like Rigel looks so bright because it’s super hot, burning like a flame in the sky.
Our Sun is yellow-white because its temperature is just right, not too hot, not too cool.
Betelgeuse glows red because it's a cooler giant star that emits mostly red light.

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Categories: Space · stars· astronomy· color· temperature