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...ibcode = 1917Natur..99..293. | s2cid=3959419 }}</ref> is a very low-mass [[red dwarf]] [[star]] approximately six [[light-year]]s away from Earth in the [ [[Category:Red dwarfs]] ...

'''Gliese 581''' is an [[Stellar classification|M-class]] [[Red dwarf|red dwarf star]] that is not far from [[Earth|the Earth]]. It is 22 [[light ye [[Category:Red dwarfs]] ...

...nterstellar extinction]], which also makes objects appear fainter and more red, is also needed. The difference between absolute and apparent magnitudes is ...and often used as standard candles to measure galactic distances. These [[red giant]]s are used for measuring distances within the [[Milky Way Galaxy|gal ...

...a of the [[Earth]] several billion years from now, when the [[Sun]] is a [[red giant]].]] | The [[red supergiant star]] [[Antares]] will have exploded in a [[supernova]] by this ...