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Why Are There No Green Stars?

Have you ever wondered why there are no green stars in the night sky? Find out why stars are different colors.

By Phil Plait and Monica Cull
Sep 21, 2023 10:00 AMSep 21, 2023 2:58 PM
Starry night with no green stars
(Credit: Traveller Martin/Shutterstock)

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An avid stargazer may notice that apart from the gleaming white stars that sprinkle the night sky, there are red, yellow, blue and orange stars. However, what you'll never see are green stars. Why is that, and why are some stars different colors than others? The answer may surprise you. 

What Color Are Stars?

On a typical cloudless night — depending on the level of light pollution — you'll see thousands of bright white stars. On certain nights throughout the year, you'll even get a glimpse of more colorful stars. Stars like Betelgeuse in the constellation Orion glow red.

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