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In the star classes O, B, A, F, G, K, M, which stars are the hottest?

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  1. Class O, which are blue
  2. Class M, which are red
  3. Class G, which are yellow

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References

  1. CAP Aerospace Dimensions Module 5, Space Environment (Alaska Wing copy) akwg.cap.gov/media/cms/Module_5__Space_Environment_C640727DEF762_83c5b.pdf Checked 2026-10-10.

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