In astronomy, the term spectral type refers to the stellar magnitude of a star based on its temperature and color.

The sun in the Sigma Draconis system was classified with a spectral type of Gamma 9. (TOS: "Spock's Brain")


The traditional classification scheme from hottest to coolest stars is:

In real life, unlike Vandor, no red giant can actually belong to type B, as B-type stars are exclusively blue or blue-white.

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