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G class star

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Sol, a G star.

A G-class (or G-type) star is a stellar classification for stars composed of both neutral and ionized atoms of metallic substances, including ionized calcium, emitting in the neighborhood of 5,000 to 6,000 Kelvin, generally referred to as being yellow in color. G-type stars in the main sequence tend to be median in terms of absolute magnitude, and in the "cooler" half of the stellar classification system. Yellow G-type stars can range in size from yellow giants to the more diminutive yellow dwarf. (ST reference: Star Charts)

G starsEdit


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 starWolf-Rayet star

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