Red dwarf

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Artist's conception of a red dwarf star, the most common type of star in the Sun's stellar neighborhood, and in the universe. Although termed a red dwarf, the surface temperature of this star would give it an orange hue when viewed from close proximity

A red dwarf is a small and relatively cool star on the main sequence, either late K or M spectral type. A red dwarf has a mass of less than half that of the Sun (down to about 0.075 solar masses, below which stellar objects are brown dwarfs) and a surface temperature of less than 4,000 K. Red dwarfs are by far the most common type of star in the Galaxy, at least in the neighborhood of the Sun. Proxima Centauri, the nearest star to the Sun, is a red dwarf (Type M5, apparent magnitude 11.05), as are twenty of the next thirty nearest. However, due to their low luminosity, individual red dwarfs cannot easily be observed. From Earth, not one is visible to the naked eye.

• See also: Wikipedia, Wiktionary

• Related: Aurelia and Blue Moon, Blue dwarf (red-dwarf stage), Cataclysmic variable star, Hertzsprung-Russell diagram, Flare star, Nemesis (hypothetical star), Red giant, Star count, Stellar evolution, White dwarf

Variable stars Variable stars www.aavso.org/vstar/vsots/fall03.shtml - Web

Stellar Flares Stellar Flares www.ucm.es/info/Astrof/invest/actividad/flares.html - Web

Red Dwarfs Red Dwarfs jumk.de/astronomie/about-stars/red-dwarfs.shtml - Web

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Red Star Rising : Small, cool stars may be hot spo... Red Star Rising : Small, cool stars may be hot spots for life www.sciam.com/.../article.cfm?chanID=sa004&articleID=000CC344-B043-1353-AF3383414B7FFE9F - Web

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