spectral class

English

Noun

spectral class (plural spectral classes)

  1. (astronomy) A classification of stars depending on their spectra and luminosity; usually one of O, B, A, F, G, K, M.
    • 2008, BioWare, Mass Effect (Science Fiction), Redwood City: Electronic Arts, →ISBN, →OCLC, PC, scene: Maji planet description:
      Maji orbits the Vamshi binary giant stars. Vamshi-A is a blue star of spectral class A4III which burns at half again the temperature of Sol. Vamshi-B is an aging red giant of class M5III, over 220 times the size of Sol.

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