Two stars, now located some 400 to 500 light-years from Earth, swung through our neighborhood on their journey through the Milky Way, coming as close as 32 light-years.
About 70,000 years ago Scholz's star passed through the Oort Cloud. It may have perturbed some comets from the Oort Cloud. But we won't know for a couple of million years because that's how long it would take for a comet to reach us.
