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Memory Beta, non-canon Star Trek Wiki
For other uses, see class M.

An example of an M-class star.

An M-class (or M-type) star is a stellar classification for red star made up of ionized atoms, especially helium. The temperature is cool at 2,500 to 3,500 degrees K. (ST reference: Star Charts)

Type M0 V stars are 0.01 times as bright as Sol and have 0.3 times its mass. Their habitable zone ranges from 0.08-0.13 AU and are 4-24 billion years old. Type M5 V stars are 0.001 times as bright as Sol and have 0.2 times its mass. Their habitable zone ranges from 0.025-0.042 AU and are 4-24 billion years old. (Decipher RPG module: Worlds)


Template image. This article is a stub relating to a star or star system. You can help our database by expanding on it.

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Stellar classification
By class and type class O blue-violet starclass B blue starclass A blue-white starclass F white star (white dwarf) • class G yellow star (yellow dwarfyellow giant) • class K orange star (orange giant) • class M red star (red dwarfred giant) • boson starbrown dwarfgreen starN-type starR-type starS-type starD-type star
By size or makeup black hole/black starcarbon stardwarf star (brown dwarfred dwarfwhite dwarfyellow dwarf) • giant star (blue giantred giantorange giantyellow giant) • Lazarus starmicrostarneutron star (collapsarmagnetarpulsar) • protostarsupergiant starvariable starwhite holeWolf-Rayet star

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