3 light years: Distance to our solar system’s Oort Cloud
4.37 light years: Distance to Proxima Centauri, our nearest neighboring star
As long as it is brown dwarf stars passing by, we should be OK. A red giant at end of life or a WolfRayet star would be bad news.
I had no idea the Oort Cloud extended that close to Proxima Centauri.
Almost one third of the Oort Cloud is closer to Proxima than it is to our sun.
You would think that Proxima and its two companion stars would have won the gravitational tug of war for a big chunk of the O-Cloud!