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For other uses, see class M.
M class star

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)


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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) • green starbrown dwarfN-type starR-type starS-type starD-type star
By size or makeup black hole/black starcarbon starcollapsardwarf star (brown dwarfred dwarfwhite dwarfyellow dwarf) • giant star (blue giantred giantorange giantyellow giant) • Lazarus starneutron starprotostarpulsarsupergiant starvariable starwhite holeWolf-Rayet star
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