Star passed through solar system 70,000 years ago
An international team of astronomers around Eric Mamajek from the University of Rochester (USA) found out that our solar system had a stellar visitor very rently, just 70,000 years ago.
This inconspicuous red dwarf star was discovered last year by Ralf-Dieter Scholz at the Leibniz Institute for Astrophysics Potsdam (AIP) with its present distance of about 20 light years. Eric Mamajek now nicknamed it "Scholz's Star". During its flyby, this star came as close as 0.8 light years (about 10 light months) to the sun and passed the exterior of the solar system, the so-called Oort cloud. For more details see the links and publications below.
Publication Mamajek et al. (2015)
Publication Scholz (2014)