SUMMARY: NASA astronomers have discovered what they believe could be the third closest star to our own Sun. The star, now called SO25300.5+165258, is a faint red star estimated to be about 7.8 light years away in the constellation of Aries. This is just beyond Alpha Centauri (which is actually a group of three stars) and Bernardís Star. This new star hasnít been discovered until now because it only has 7% of the mass of our own Sun, and is 300,000 times fainter.
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