The S-type (or S-class) is a type of star.
When the USS Enterprise arrived in the vicinity of Sigma-285 Trianguli in the 2270s, unnamed stars of this type were noted by sensors. A sputtering S-type, borderline carbon star, had water vapor in its atmosphere, to which Uhura joked to Spock meant the star was "running out of steam". (TOS novel: My Enemy, My Ally)
|By class and type||class O blue-violet star • class B blue star • class A blue-white star • class F white star (white dwarf) • class G yellow star (yellow dwarf • yellow giant) • class K orange star (orange giant) • class M red star (red dwarf • red giant) • green star • brown dwarf • N-type star • R-type star • S-type star • D-type star|
|By size or makeup||black hole/black star • carbon star • collapsar • dwarf star (brown dwarf • red dwarf • white dwarf • yellow dwarf) • giant star (blue giant • red giant • orange giant • yellow giant) • Lazarus star • neutron star • protostar • pulsar • supergiant star • variable star • white hole • Wolf-Rayet star|