And that's what we're here for. Let's say that the outer spiral arm of the Milky Way (the galaxy our solar system is located in) moves at roughly 1 million miles a day (heard this somewhere so it might not be totally accurate, but I'm sure it's a good estimate.)

So 1,000,000 miles/day is actually equal to roughly 41,666 MPH. Pretty fast right? Well light moves at around 4 times that distance per second! So if our theoretical brown dwarf is 14 light years away and heading right for us it will be here in 5,865,696 days or roughly 16,000 years. I'm not going to buy my bomb shelter just yet. :wink: