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March 23, 2018 10:00 am
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/9kvgOysenQU/a-star-grazed-our-solar-system-70000-years-ago-early-humans-likely-saw-it
A Star Grazed Our Solar System 70,000 Years Ago, Early Humans Likely Saw It
schwit1 shares a report from Space.com: Some distant objects in our solar system bear the gravitational imprint of a small star's close flyby 70,000 years ago, when modern humans were already walking the Earth, a new study suggests. In 2015, a team of researchers announced that a red dwarf called Scholzs star apparently grazed the solar system 70,000 years ago, coming closer than 1 light-year to the sun. For perspective, the suns nearest stellar neighbor these days, Proxima Centauri, lies about 4.2 light-years away. The astronomers came to this conclusion by measuring the motion and velocity of Scholzs star -- which zooms through space with a smaller companion, a brown dwarf or "failed star" -- and extrapolating backward in time. Scholz's star passed by the solar system at a time when early humans and Neanderthals shared the Earth. The star likely appeared as a faint reddish light to anyone looking up at the time, researchers with the new study said. The study has been published in the journal Monthly Notices of the Royal Astronomical Society: Letters.Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/9kvgOysenQU/a-star-grazed-our-solar-system-70000-years-ago-early-humans-likely-saw-it
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