Alpha Centauri is a few trillion miles from the Sun.
Alpha Centauri A -LRB-  Cen A -RRB- has 1.1 times the mass and 1.519 times the luminosity of the Sun , while Alpha Centauri B -LRB-  Cen B -RRB- is smaller and cooler , at 0.907 times the Sun 's mass and 0.445 times its visual luminosity .	Sun	Sun
Alpha Centauri -LRB-  Centauri , abbreviated Alpha Cen ,  Cen -RRB- is the closest star system to the Solar System , being 4.37 ly from the Sun .	closest	List of nearest stars and brown dwarfs	Solar System	Solar System	star	star	Sun	Sun
