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M star

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WordReference Random House Unabridged Dictionary of American English © 2026

M star, [Astron.]

Astronomya relatively cool, red star, as Antares or Betelgeuse, having a surface temperature of less than 3600 K and an absorption spectrum dominated by molecular bands, esp. titanium oxide. Cf. spectral type.

Forum discussions with the word(s) "M star" in the title:

I always wanted to be different. I was a bit of a... hairbrush princess (...) Think I'm a pop star.

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