* Astronomy

Title: Searching for Stars Closely Encountering with the Solar System
Authors: Vadim V. Bobylev

Based on a new version of the Hipparcos catalogue and currently available radial velocity data, we have searched for stars that either have encountered or will encounter the solar neighbourhood within less than 3 pc in the time interval from -2 Myr to +2 Myr. Nine new candidates within 30 pc of the Sun have been found. To construct the stellar orbits relative to the solar orbit, we have used the epicyclic approximation. We show that, given the errors in the observational data, the probability that the well-known star HIP 89 825 (GL 710) encountering with the Sun most closely falls into the Oort cloud is 0.86 in the time interval 1.45±0.06 Myr. This star also has a nonzero probability, 0.0001, of falling into the region d<1000 AU, where its influence on Kuiper Belt objects becomes possible.

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At its closest approach, Gl 710 will rival the brightness of the red supergiant Antares, although it is currently not even visible to the naked eye of Earth-bound Humans.
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Ed ~ There will be a few close flybys of four or five stars over the next few million years time.
However, the disruption from those  I suspect would not be that significant. Surprisingly there hasn't been a close flyby of a star for about 8 millions years (the last I believe was a close encounter with Altair). More significant event would be the affects of the passing of the Scorpius-Centaurus horde, that passed about three million years ago.