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The term spectral type in astronomy referred to the stellar magnitude of a star based on its temperature and color. Among the spectral types were the O-type star, B-type star, F-type star and G-type star.

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

Background information Edit

The traditional scientific classification scheme, called the Harvard system, from hottest to coolest stars is:

The onscreen classification of Vandor as B-type is inconsistent with its visual appearance.

It is unknown to which of those spectral types a "Gamma 9" could belong to; it is possibly a subtype of the G-type star, like a G1 star.

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