Security ... think about it!
Judging by its trajectory, there's an 86 percent chance the star will punch through the Oort Cloud (thought to be located about 50,000 AU -- or nearly a light-year -- from the sun). This may sound like a flesh wound, a near miss in cosmological distances, but any gravitational interaction with the huge chunks of cometary nuclei in the outermost extent of the solar system is bad news. It is hypothesized that close encounters of the stellar kind have kicked OCOs out of the Oort Cloud in the past, creating some of the long period comets we see today, such as comet Hale Bopp. It is also thought that such encounters could periodically cause mass extinction events on Earth through comet impacts. Although the star -- currently located 63 light years from Earth and approximately half the mass of our sun -- has been known to be heading for us for some time, this is the first time such a high probability for a close encounter has been calculated.
