Next is Barnard's Star , a dim star visible with a telescope in the constellation of Ophiuchus . Sirius , the brightest star in the night sky, is part of the fifth closest star system, from which light takes 8.6 years to reach us. The nearest 25 star systems are shown on the above map , out to 13 light-years . Past that there are probably stars so dim that their proximity has not yet been discovered. Research continues in trying to identify an estimated 130 missing star systems out to 32 light-years.
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